FORMS OF VERB

What is verb? Infinitive	Simple Past	Past Participle
A
arise	arose	arisen
awake	awakened / awoke	awakened / awoken
B
backslide	backslid	backslidden / backslid
be	was, were	been
bear	bore	born / borne
beat	beat	beaten / beat
become	became	become
begin	began	begun
bend	bent	bent
bet	bet / betted	bet / betted
bid (farewell)	bid / bade	bidden
bid (offer amount)	bid	bid
bind	bound	bound
bite	bit	bitten
bleed	bled	bled
blow	blew	blown
break	broke	broken
breed	bred	bred
bring	brought	brought
broadcast	broadcast / broadcasted	broadcast / broadcasted
browbeat	browbeat	browbeaten / browbeat
build	built	built
burn	burned / burnt	burned / burnt
burst	burst	burst
bust	busted / bust	busted / bust
buy	bought	bought
C
cast	cast	cast
catch	caught	caught
choose	chose	chosen
cling	clung	clung
clothe	clothed / clad	clothed / clad
come	came	come
cost	cost	cost
creep	crept	crept
crossbreed	crossbred	crossbred
cut	cut	cut
D
daydream	daydreamed / daydreamt [?]	daydreamed / daydreamt [?]
deal	dealt	dealt
dig	dug	dug
disprove	disproved	disproved / disproven
dive (jump head-first)	dove / dived	dived
dive (scuba diving)	dived / dove	dived
do	did	done
draw	drew	drawn
dream	dreamed / dreamt	dreamed / dreamt
drink	drank	drunk
drive	drove	driven
dwell	dwelt / dwelled [?]	dwelt / dwelled [?]
E
eat	ate	eaten
F
fall	fell	fallen
feed	fed	fed
feel	felt	felt
fight	fought	fought
find	found	found
fit (tailor, change size)	fitted / fit [?]	fitted / fit [?]
fit (be right size)	fit / fitted [?]	fit / fitted [?]
flee	fled	fled
fling	flung	flung
fly	flew	flown
forbid	forbade	forbidden
forecast	forecast	forecast
forego (also forgo)	forewent	foregone
foresee	foresaw	foreseen
foretell	foretold	foretold
forget	forgot	forgotten / forgot [?]
forgive	forgave	forgiven
forsake	forsook	forsaken
freeze	froze	frozen
frostbite	frostbit	frostbitten
G
get	got	gotten / got [?]
give	gave	given
go	went	gone
grind	ground	ground
grow	grew	grown
H
hand-feed	hand-fed	hand-fed
handwrite	handwrote	handwritten
hang	hung	hung
have	had	had
hear	heard	heard
hew	hewed	hewn / hewed
hide	hid	hidden
hit	hit	hit
hold	held	held
hurt	hurt	hurt
I
inbreed	inbred	inbred
inlay	inlaid	inlaid
input	input / inputted	input / inputted
interbreed	interbred	interbred
interweave	interwove / interweaved	interwoven / interweaved
interwind	interwound	interwound
J
jerry-build	jerry-built	jerry-built
K
keep	kept	kept
kneel	knelt / kneeled	knelt / kneeled
knit	knitted / knit	knitted / knit
know	knew	known
L
lay	laid	laid
lead	led	led
lean	leaned / leant	leaned / leant
leap	leaped / leapt	leaped / leapt
learn	learned / learnt	learned / learnt
leave	left	left
lend	lent	lent
let	let	let
lie	lay	lain
lie (not tell truth) REGULAR	lied	lied
light	lit / lighted	lit / lighted
lip-read	lip-read	lip-read
lose	lost	lost
M
make	made	made
mean	meant	meant
meet	met	met
miscast	miscast	miscast
misdeal	misdealt	misdealt
misdo	misdid	misdone
mishear	misheard	misheard
mislay	mislaid	mislaid
mislead	misled	misled
mislearn	mislearned / mislearnt	mislearned / mislearnt
misread	misread	misread
misset	misset	misset
misspeak	misspoke	misspoken
misspell	misspelled / misspelt	misspelled / misspelt
misspend	misspent	misspent
mistake	mistook	mistaken
misteach	mistaught	mistaught
misunderstand	misunderstood	misunderstood
miswrite	miswrote	miswritten
mow	mowed	mowed / mown
N
No irregular verbs beginning with "N."
O
offset	offset	offset
outbid	outbid	outbid
outbreed	outbred	outbred
outdo	outdid	outdone
outdraw	outdrew	outdrawn
outdrink	outdrank	outdrunk
outdrive	outdrove	outdriven
outfight	outfought	outfought
outfly	outflew	outflown
outgrow	outgrew	outgrown
outleap	outleaped / outleapt	outleaped / outleapt
outlie (not tell truth) REGULAR	outlied	outlied
outride	outrode	outridden
outrun	outran	outrun
outsell	outsold	outsold
outshine	outshined / outshone	outshined / outshone
outshoot	outshot	outshot
outsing	outsang	outsung
outsit	outsat	outsat
outsleep	outslept	outslept
outsmell	outsmelled / outsmelt	outsmelled / outsmelt
outspeak	outspoke	outspoken
outspeed	outsped	outsped
outspend	outspent	outspent
outswear	outswore	outsworn
outswim	outswam	outswum
outthink	outthought	outthought
outthrow	outthrew	outthrown
outwrite	outwrote	outwritten
overbid	overbid	overbid
overbreed	overbred	overbred
overbuild	overbuilt	overbuilt
overbuy	overbought	overbought
overcome	overcame	overcome
overdo	overdid	overdone
overdraw	overdrew	overdrawn
overdrink	overdrank	overdrunk
overeat	overate	overeaten
overfeed	overfed	overfed
overhang	overhung	overhung
overhear	overheard	overheard
overlay	overlaid	overlaid
overpay	overpaid	overpaid
override	overrode	overridden
overrun	overran	overrun
oversee	oversaw	overseen
oversell	oversold	oversold
oversew	oversewed	oversewn / oversewed
overshoot	overshot	overshot
oversleep	overslept	overslept
overspeak	overspoke	overspoken
overspend	overspent	overspent
overspill	overspilled / overspilt	overspilled / overspilt
overtake	overtook	overtaken
overthink	overthought	overthought
overthrow	overthrew	overthrown
overwind	overwound	overwound
overwrite	overwrote	overwritten
P
partake	partook	partaken
pay	paid	paid
plead	pleaded / pled	pleaded / pled
prebuild	prebuilt	prebuilt
predo	predid	predone
premake	premade	premade
prepay	prepaid	prepaid
presell	presold	presold
preset	preset	preset
preshrink	preshrank	preshrunk
proofread	proofread	proofread
prove	proved	proven / proved
put	put	put
Q
quick-freeze	quick-froze	quick-frozen
quit	quit / quitted	quit / quitted
R
read	read (sounds like "red")	read (sounds like "red")
reawake	reawoke	reawaken
rebid	rebid	rebid
rebind	rebound	rebound
rebroadcast	rebroadcast / rebroadcasted	rebroadcast / rebroadcasted
rebuild	rebuilt	rebuilt
recast	recast	recast
recut	recut	recut
redeal	redealt	redealt
redo	redid	redone
redraw	redrew	redrawn
refit (replace parts)	refit / refitted	refit / refitted
refit (retailor)	refitted / refit	refitted / refit
regrind	reground	reground
regrow	regrew	regrown
rehang	rehung	rehung
rehear	reheard	reheard
reknit	reknitted / reknit	reknitted / reknit
relay (for example tiles)	relaid	relaid
relay (pass along) REGULAR	relayed	relayed
relearn	relearned / relearnt	relearned / relearnt
relight	relit / relighted	relit / relighted
remake	remade	remade
repay	repaid	repaid
reread	reread	reread
rerun	reran	rerun
resell	resold	resold
resend	resent	resent
reset	reset	reset
resew	resewed	resewn / resewed
retake	retook	retaken
reteach	retaught	retaught
retear	retore	retorn
retell	retold	retold
rethink	rethought	rethought
retread	retread	retread
retrofit	retrofitted / retrofit	retrofitted / retrofit
rewake	rewoke / rewaked	rewaken / rewaked
rewear	rewore	reworn
reweave	rewove / reweaved	rewoven / reweaved
rewed	rewed / rewedded	rewed / rewedded
rewet	rewet / rewetted	rewet / rewetted
rewin	rewon	rewon
rewind	rewound	rewound
rewrite	rewrote	rewritten
rid	rid	rid
ride	rode	ridden
ring	rang	rung
rise	rose	risen
roughcast	roughcast	roughcast
run	ran	run
S
sand-cast	sand-cast	sand-cast
saw	sawed	sawed / sawn
say	said	said
see	saw	seen
seek	sought	sought
sell	sold	sold
send	sent	sent
set	set	set
sew	sewed	sewn / sewed
shake	shook	shaken
shave	shaved	shaved / shaven
shear	sheared	sheared / shorn
shed	shed	shed
shine	shined / shone	shined / shone
shit	shit / shat / shitted	shit/ shat / shitted
shoot	shot	shot
show	showed	shown / showed
shrink	shrank / shrunk	shrunk
shut	shut	shut
sight-read	sight-read	sight-read
sing	sang	sung
sink	sank / sunk	sunk
sit	sat	sat
slay (kill)	slew / slayed	slain / slayed
slay (amuse) REGULAR	slayed	slayed
sleep	slept	slept
slide	slid	slid
sling	slung	slung
slink	slinked / slunk	slinked / slunk
slit	slit	slit
smell	smelled / smelt	smelled / smelt
sneak	sneaked / snuck	sneaked / snuck
sow	sowed	sown / sowed
speak	spoke	spoken
speed	sped / speeded	sped / speeded
spell	spelled / spelt	spelled / spelt
spend	spent	spent
spill	spilled / spilt	spilled / spilt
spin	spun	spun
spit	spit / spat	spit / spat
split	split	split
spoil	spoiled / spoilt	spoiled / spoilt
spoon-feed	spoon-fed	spoon-fed
spread	spread	spread
spring	sprang / sprung	sprung
stand	stood	stood
steal	stole	stolen
stick	stuck	stuck
sting	stung	stung
stink	stunk / stank	stunk
strew	strewed	strewn / strewed
stride	strode	stridden
strike (delete)	struck	stricken
strike (hit)	struck	struck / stricken
string	strung	strung
strive	strove / strived	striven / strived
sublet	sublet	sublet
sunburn	sunburned / sunburnt	sunburned / sunburnt
swear	swore	sworn
sweat	sweat / sweated	sweat / sweated
sweep	swept	swept
swell	swelled	swollen / swelled
swim	swam	swum
swing	swung	swung
T
take	took	taken
teach	taught	taught
tear	tore	torn
telecast	telecast	telecast
tell	told	told
test-drive	test-drove	test-driven
test-fly	test-flew	test-flown
think	thought	thought
throw	threw	thrown
thrust	thrust	thrust
tread	trod	trodden / trod
typecast	typecast	typecast
typeset	typeset	typeset
typewrite	typewrote	typewritten
U
unbend	unbent	unbent
unbind	unbound	unbound
unclothe	unclothed / unclad	unclothed / unclad
underbid	underbid	underbid
undercut	undercut	undercut
underfeed	underfed	underfed
undergo	underwent	undergone
underlie	underlay	underlain
undersell	undersold	undersold
underspend	underspent	underspent
understand	understood	understood
undertake	undertook	undertaken
underwrite	underwrote	underwritten
undo	undid	undone
unfreeze	unfroze	unfrozen
unhang	unhung	unhung
unhide	unhid	unhidden
unknit	unknitted / unknit	unknitted / unknit
unlearn	unlearned / unlearnt	unlearned / unlearnt
unsew	unsewed	unsewn / unsewed
unsling	unslung	unslung
unspin	unspun	unspun
unstick	unstuck	unstuck
unstring	unstrung	unstrung
unweave	unwove / unweaved	unwoven / unweaved
unwind	unwound	unwound
uphold	upheld	upheld
upset	upset	upset
V
No commonly used irregular verbs beginning with "V."
W
wake	woke / waked	woken / waked
waylay	waylaid	waylaid
wear	wore	worn
weave	wove / weaved	woven / weaved
wed	wed / wedded	wed / wedded
weep	wept	wept
we	wet / wetted	wet / wetted
whet  REGULAR	whetted	whetted
win	won	won
wind	wound	wound
withdraw	withdrew	withdrawn
withhold	withheld	withheld
withstand	withstood	withstood
wring	wrung	wrung
write	wrote	written
X
No irregular verbs beginning with "X."
Y
No irregular verbs beginning with "Y."
Z
No irregular verbs beginning with "Z."

Origin of life on earth

 History of origination👸

What is Evolution?

Any process of formation or growth; development:
In other words, Evolution is a process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.

In biology,Evolution refers to a gradual change in the characteristics of a population of animals or plants over successive generations: accounts for the origin of existing species from ancestors unlike them

Evolution on earth

HISTORICAL USAGE OF EVOLUTION

Evolution comes from Latin ēvolūtiō (stem ēvolūtiōn- ) “unrolling a papyrus scroll, reading through (an author's words or a book),” a derivative of the verb ēvolvere “to roll out or away, unroll (a papyrus scroll), uncover, unwrap, unfold by using the intellect.”
The earliest English meaning of evolution, “a movement or series of movements of troops or ships into battle formation,” dates from the early 17th century. The modern, biological sense “change in the gene pool of a population from generation to generation by mutation, natural selection, and genetic drift,” first appears in 1832 in the works of British geologist Charles Lyell in a discussion of some invertebrate sea creatures.
Charles Darwin did not use the word evolution at all in his first edition of On the Origin of Species (1859), although he did use the verb evolved at the very end of the book. Darwin preferred descent with modification, because the idea of progress had no place in his theory or work. It was his contemporary Herbert Spencer who, embracing Darwin's work, popularized evolution in its biological sense and also extended the word into ethics, philosophy, and sociology.

John Burdon Sanderson
Haldane FRS,
nicknamed "Jack"

J.B.S Haldane

(He gives the theory of history of life)

Haldane was born in Oxford to John Scott Haldane, a physiologist, scientist, a philosopher and a Liberal, and Louisa Kathleen Trotter, a Conservative. His younger sister, Naomi Mitchison, became a writer, and his uncle was Viscount Haldane and his aunt the author Elizabeth Haldane.

Suggestion on origin of life:

A British scientist J.B.S Haldane suggested in 1929that life must have developed from the simple inorganic molecules(such as methane ,ammonia, hydrogen sulphide, etc.)which was present soon after the earth it was formed. He said that the conditions on earth at that time including frequent lightning could have converted simple inorganic molecules into complex organic molecules which were necessary for life.

These complex organic molecules must have joined together to form first primitive living organisms. Haldane also suggested from theoretical considerations that life or living organisms originated in the water.

The theory of origin of life on earth proposed by Haldane was confirmed by experiments conducted by Stanley L. Miller and Harold C. Urey in 1953.They assembled an  apparatus to create an early atmosphere which was proposed to consist of gases like methane,ammonia, hydrogen sulphide, etc,(but no oxygen),over water. This was maintained at a temperature at below 100 degree Celcius and electric sparks then passed through mixture of gases(to stimulate the lightning) for about one week.

At the end of one week,it was  found that about 15 percent of crbon has been converted into simple compounds ofcarbon including 'amino acid'which make up protien molecules found in living oganisms.

 This experiment provides the evidence that the life originated from the inanimate matter(or lifeless matter) like  inorganic molecules. 

Theories on the origin of life:

The origin and evolution of the earth

Early Theories

Nebular Hypothesis

• Immanuel Kant, a German philosopher, gave this theory.
• In 1796, a mathematician Pierre-Simon Laplace reexamined it.
• According to this hypothesis, the planets were moulded out of a cloud of material associated with a young Sun, which was rotating slowly.

Binary theories

• As per these theories, the sun had a companion.

Revised Nebular Hypothesis

• Revised Nebular Hypothesis was propounded by Carl Weizascar in Germany and Otto Schmidt in Russia.
• They regarded that a solar nebula surrounded the sun and that the nebula comprised of chiefly hydrogen, helium and something called dust.
• The collision of particles and the friction caused a disk-shaped cloud to be formed and then the planets were created via the accretion process.

Modern theories

Big Bang Theory

• Alternatively called the expanding universe hypothesis.
• As per this theory, in the beginning, all matter or substance forming this universe existed at one place as a tiny ball. This tiny ball had an extremely small volume, infinite density and temperature.
• At the Big Bang, this ball blasted fiercely and forcefully and started a substantial process of expansion which continues to this day.
• Now it is accepted that this event took place 13.7 billion years ago.

Origin of Earth

Formation of Planets

The following are regarded as the stages in the planets’ development:

• The stars are localised gas lumps inside a nebula.
• A core to the gas cloud as well as a spinning disc of dust and gas are created because of the gravitational force within the lumps.
• After this, the cloud of the gas condenses and the matter over the core is changed into tiny rounded objects.
• These small round objects develop into what are called planetesimals by a cohesion process.
• The smaller objects start forming larger bodies by colliding with one another and they stick together because of gravitational force.
• In the last stage, these large number of small planetesimals aggregate to develop into a smaller number of large bodies called planets.