Yes, we use an apostrophe where we deliberately shorten a word or phrase and then use an apostrophe to show that letters are missing.
These are called contractions.
"Wait a moment!" I hear you cry. "What about possession?"
Well, in fact it's the same rule,
Why not try a little test paper? A bit like going back to school, but no detention of you get it wrong.
Home | Do you know? | Self Test | The little red book | Testimonials | Gallery Quiz| Links