May the peace and mercy of Allah be upon you
The definition of contraction is to shorten, shrink or decrease in size. A contraction in the English language is a word made by shortening two words into one. One or more letters are dropped to combine two words into one word. In writing, an apostrophe ( ' ) takes the place of the missing letters. Contractions are used frequently in speaking and writing English.
Standard Contractions in English
aren't = are not
can't = cannot (can + not)
couldn't = could not
didn't = did not
doesn't = does not
don't = do not
hadn't = had not
hasn't = has not
haven't = have not
he'd = he had; he would
he'll = he will; he shall
he's = he is; he has
I'd = I had; I would
I'll = I will; I shall
I'm = I am (very common)
I've = I have
isn't = is not
it's = it is
let's = let us
mightn't = might not (not frequently used)
mustn't = must not
shan't = shall not (rarely used)
she'd = she had; she would
she'll = she will; she shall
she's = she is; she has
shouldn't = should not
that's = that is; that has
there's = there is; there has
they'd = they had; they would
they'll = they will; they shall
they're = they are
they've = they have
we'd = we had; we would
we're = we are
we've = we have
weren't = were not
what'll = what will; what shall
what're = what are (not frequently used)
what's = what is; what has
what've = what have
where's = where is; where has
who'd = who had; who would
who'll = who will; who shall
who're = who are (not frequently used)
who's = who is; who has
who've = who have
won't = will not
wouldn't = would not
you'd = you had; you would
you'll = you will; you shall
you're = you are
you've = you have
Note: the word "shall" (in the contractions he'll, they'll, we'll etc) is considered very formal and it's not commonly used in everday speaking and writing. The word "will" is typical to say and write, not shall.