Meaning of 'D in English

1. contraction of had: I was glad they'd gone.

2. contraction of did: Where'd they go?

3. contraction of should or would: He'd like to go. I'd like to remind you of your promise.

4. contraction of - ed: She OK'd the plan.

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .