Em inglês, o apóstrofo (apostrophe) usa-se:
1 em formas possessivas:
This is John's house.
These are the boys' bicycles.
Para mais exemplos, veja possessive case
2 em formas contraídas:
I'll see you tomorrow.
He doesn't like coffee.
Para mais exemplos, veja verb contractions
John was born in '97.
They met in the summer of '92.
See you at 7 o'clock.
· dialectos (por ex. h mudo):
When 'e arrived 'ome, 'is wife kissed 'im.
3 em certos plurais:
How many c's and m's are there in accommodation?
Life was hard in the 1920's.
The way you write, your 7's look like 1's.
You have seven and's in this sentence. There are too many!
John met two VIP's yesterday. (1)
How many MP's do you know personally? (2)
(1) VIP = very important person
(2) MP = Member of Parliament