Common Grammar Errors

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List of common grammar errors and easily confused words
A^ top
abbreviations
an or a
BBC or B.B.C.
BC and AD
contractions (Mr or Mr.)
e.g. and i.e.
plurals (PCs or PC's)
accept and except
AD and BC
adjectives
an or a
auntie June or Auntie June
compound adjectives (e.g. 4-seater aircraft)
contractions (Mr or Mr.)
expressions like 3-and-a-quarter million
extremely-talented actor or extremely talented actor
hers or her's, ours or our's
hyphens in adjectives (e.g. 4-seater aircraft)
its and it's
Red Lion Lawn or Red Lion lawn
well-known actor or well known actor
adoptive and adopted
adverbial clause
adverbial phrase
adverbs
"At 4 o'clock, she..." or "At 4 o'clock she..."
extremely-talented actor or extremely talented actor
well-known actor or well known actor
adverse and averse
advice and advise
affect or effect
agenda (plural or singular)
all or all of
allot, a lot and allot
allude and elude
allusion and illusion
allowed and aloud
already or all ready
alright or all right
altar and alter
altogether and all together
amoral and immoral
amount, quantity and number
an or a
an or a (with abbreviations)
and in a list (with a comma or not)
"and I" or "and me"
and joining two sentences (with a comma or not)
and (starting a sentence)
appraise and apprise
apostrophes
could of, would of, should of
her's, our's, their's, your's
its and it's
possession
plurals
temporal expressions (e.g. 3 years' insurance)
you're and your
auntie June or Auntie June
autumn or Autumn
B^ top
bare and bear
BC
being or been
beside and besides
"between you and I"
brackets for parentheses
breathe and breath
but in a list (with a comma or not)
but joining two sentences (with a comma or not)
but (starting a sentence)
 
C^ top
can and may
can not
canvas and canvass
capital letters
Auntie June or auntie June
company or Company
however or However
capital letter for important words
common nouns
moons, stars and planets
points of the compass
proper nouns (names)
Red Lion Lawn or Red Lion lawn
seasons
title case
censor, censure and sensor
cite, sight and site
climactic and climatic
collective noun (singular or plural)
coarse and course
colons
before a quotation
used to extend a sentence
commas
after an introductory phrase (e.g. On 4 Jul 1984,)
after an interjection (e.g. Yes,)
after long subject of a sentence
after transitional phrases (e.g. As a result,)
before and (in a list)
before and (joining two sentences)
before quotation marks
for parentheses
starting a new sentence after a comma
with adjectives
with vocative case (e.g. John,)
which (comma before or not)
comparatives and superlatives
most prettiest (errors with adjectives)
most fastest (errors with adverbs)
complement and compliment
compound adjectives
extremely-talented actor or extremely talented actor
hyphen in a compound adjective (e.g. two-seater aircraft)
use of capital letters, italics and quotation marks
well-known actor or well known actor
3-and-a-half million or 3 and a half million
compound nouns
forming plurals
possessive forms of compound nouns (e.g. sister-in-law's)
with hyphens (e.g. cooking-oil)
compose and comprise ('comprise of' and 'is comprised of')
conjunctions
in a list (with or without a comma)
joining two sentences (with or without a comma)
joining two sentences (using a semicolon)
starting a sentence
contractions (Mr or Mr.)
council and counsel
could of
criteria (plural or singular)
 
D^ top
dangling modifiers
dash used to extend a sentence
dashes for parentheses
data (plural or singular)
decent, descent and dissent
definite and definitive
defuse and diffuse
dependant and dependent
desert and dessert
discreet and discrete
disinterested and uninterested
double negative with neither/nor
 
E^ top
east or East
economic and economical
effect or affect
e.g and i.e.
elicit and illicit
either and neither
double negative with neither/nor
plural
singular
ellipsis (three or four dots)
elude and allude
enquiry and inquiry
envelop and envelope
etc or ect
except and accept
 
F^ top
fewer or less
forth and fourth
forty not fourty
 
G^ top
getaway and get away
grisly and grizzly
H^ top
he/she and his/her (accepted convention)
her's
historic and historical
however or However
hyphens
after prefixes (e.g. ex-President)
compound adjectives (e.g. two-seater aircraft)
compound nouns (e.g. cooking-oil)
extremely-talented actor or extremely talented actor
well-known actor or well known actor
 
I^ top
i.e. and e.g.
if or whether
illicit and elicit
illusion and allusion
immoral and amoral
imply and infer
incidence and incidents
incite and insight
inquiry and enquiry
instance and instants
interjections
in official writing
punctuation
into, onto and up to
its and it's
 
J^ top
K^ top
L^ top
lay and lie
lead and led
less or fewer
licence or license
lists including semicolons
loath and loathe
loose and lose
M^ top
may and can
more lovelier
most fastest
"my husband/wife and I" or "...and me"
 
N^ top
no-one or no one
none is or none are
north or North
notable and noticeable
number, amount and quantity
numbers
expressions like 3-and-a-quarter million
forty
starting sentences with figures
writing numbers in full
 
O^ top
onto, into and up to
or in a list (with a comma or not)
or joining two sentences (with a comma or not)
our's 
 
P^ top
parenthesis
commas for parenthesis
end a parenthesis
parentheses (brackets, commas or dashes)
past or passed
plain and plane
plurals
agenda, data, criteria (plural or singular)
forming plurals
forming plurals of compound nouns
lion's instead of lions
none (plural or singular)
plural of abbreviations (PCs or PC's)
spoonsful or spoonfuls
pore, pour and poor
possession
cat's dinner or cats' dinner 
possessive forms of compound nouns (e.g. sister-in-law's)
Evans' report or Evans's report
John and Bill's report or John's and Bill's report
men's room or mens' room
practice or practise
prepositions
ending a sentence
following a preposition (who or whom)
with verbs (preposition required or not)
prepositional phrases (e.g. box of tapes) singular or plural
principal and principle
precede and proceed
precedence and precedent
prophecy and prophesy
proscribe and prescribe
provided or providing
 
Q^ top
quantity, amount and number
question mark inside or outside of quotation
quotation marks
colon before a quotation
comma before a quotation
punctuation before the quotation or not
punctuation inside or outside the quotation
singular quotation marks within doubles
tautology (e.g. so-called "clean" hands)
 
R^ top
raise, rise and raze
role and roll
S^ top
semicolon
before transitional phrases (e.g. ...in the end; as a result,)
before and (joining two sentences)
for introduction (misuse)
mistakenly using a colon in place of a semicolon
separating list items
too many semicolons
used to extend a sentence
sensor, censor and censure
sentences
capital letters (including quotations)
ending a sentence in a preposition
extending a sentence with a colon
extending a sentence with a dash
extending a sentence with a semicolon
extending a sentence with three dots
starting a new sentence after a comma
starting a sentence with which or who
starting sentences with figures
should of
sight, site and cite
so (comma after)
south or South
speech marks
colon before a quotation
comma before a quotation
punctuation before the quotation or not
punctuation inside or outside the quotation
singular speech marks within doubles
tautology (e.g. so-called "clean" hands)
split infinitive (e.g. to really try)
spoonsful or spoonfuls
spring or Spring
stationary and stationery
storey and story
subject (long) grouped with a comma
summer or Summer
superlatives and comparatives
most fastest (errors with adverbs)
most prettiest (errors with adjectives)
 
T^ top
temporal expressions (e.g. 3 years' insurance)
that, which and who (overview)
that, which and who (comma before or not)
their's
these kind of
then and than
they're, their or there
three dots used to extend a sentence
too or to
 
U^ top
up to, into and onto
uninterested and disinterested
uncle Joe or Uncle Joe
 
V^ top
vain, vein and vane
verbs
dangling modifiers
preposition required or not
re-word to avoid a dangling modifier
vocative case (e.g. John,)
 
W^ top
waist and waste
weather, whether and wether
well-known actor or well known actor
west or West
whether or if
which, who and that (overview)
which, who and that (comma before or not)
who or whom
following a preposition (who or whom)
who (comma before or not)
who's and whose
winter or Winter
would of
 
X^ top
Y^ top
you and I or you and me
you're and your
your's
 
Z^ top

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Glossary of Grammatical Terms
 
 

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