I am – I’m
I will – I’ll
I have – I’ve
I had – I’d (реже)
I would – I’d (чаще)
he is – he’s
he has – he’s
she is – she’s
she has – she’s
it is – it’s
it has – It’s
we are – we’re
do not – don’t
did not – didn’t
was not – wasn’t
were not – weren’t
have not – haven’t
had not – hadn’t
cannot – can’t
will not – won’t