Using Apostrophes to Replace Missing Letters (Grammar Lesson)

The Quick Answer
An apostrophe can be used to replace a letter (or letters). For example:

  • isn't (from is not)
  • don't (from do not)
  • can't (from cannot)
When this happens, a new word (called a contraction) is formed.

Apostrophes Replace Missing Letters

An apostrophe can be used to show that a letter (or letters) is missing from a word.

Using an apostrophe to replace a missing letter is not common in formal writing, where you'd expect all words to be written in full. (Using an apostrophe to replace a letter is extremely common, but it is generally reserved for informal writing. It is used to reflect how people speak.)

Examples:
  • The weather's bad.
  • (Written in full: The weather is bad.)
    (In this example, the apostrophe replaces the letter i, and the two words are joined to make one. The new word is called contraction.)

  • Don't think about it.
  • (In full: Do not)
    In this example, the apostrophe replaces the letter o, and the two words are joined to make a contraction.)


Apostrophe error found in a Christmas cracker
  • Alan can't deliver on Tuesdays.
  • (In full: cannot)
  • If you don't fail now and again, it's a sign you're playing it safe. (Woody Allen)
  • (In full: do not / it is / you are)
  • Don't look now, but there's one too many in this room, and I think it's you. (Groucho Marx)
  • (In full: do not / there is / it is)
  • Blood's not thicker than money. (Groucho Marx)
  • (In full: blood is)
  • Sally is'nt able to complete her work.
  • (Should be: isn't)

Only Use Apostrophes to Replace Letters in Standard Contractions

When an apostrophe replaces a letter, a new word is formed (most often, but not always, using the remaining letters of the original words). The new word is called a contraction.

You cannot invent your own contractions. Here is a list of common contractions in English:

ContractionOriginal
aren'tare not
can'tcannot
couldn'tcould not
didn'tdid not
doesn'tdoes not
don'tdo not
hadn'thad not
hasn'thas not
haven'thave not
he'dhe had, he would
he'llhe will, he shall
he'she is, he has
I'dI had, I would
I'llI will, I shall
I'mI am
I'veI have
isn'tis not
it'sit is, it has
let'slet us
mustn'tmust not
shan'tshall not
she'dshe had, she would
she'llshe will, she shall
she'sshe is, she has
shouldn'tshould not
that'sthat is, that has
there'sthere is, there has
they'dthey had, they would
they'llthey will, they shall
they'rethey are
they'vethey have
we'dwe had, we would
we'rewe are
we'vewe have
weren'twere not
what'llwhat will, what shall
what'rewhat are
what'swhat is, what has
what'vewhat have
where'swhere is, where has
who'dwho had, who would
who'llwho will, who shall
who'rewho are
who'swho is, who has
who'vewho have
won'twill not
wouldn'twould not
you'dyou had, you would
you'llyou will, you shall
you'reyou are
you'veyou have

See Also

Using apostrophes The apostrophe error with plurals Apostrophes in time (temporal) expressions Apostrophes to show the plural of abbreviations Apostrophes show possession