I must have forgotten it.

Tom must've forgotten his promise.

It's like the older women somehow forgot.

Sorry that I forgot. I'm completely out of it today.

Will she forgive him for forgetting her birthday?

Some students seem to have forgotten to do their homework.

I admit that I've already forgotten what I wanted to say.

Some people seem to have forgotten what it was like before the war.

Some students seem to have forgotten to do their homework.

Nobody has been forgotten and nothing has been forgotten.

So I may have forgotten to mention that my son is an only child.

You should have seen it.

You should have seen it!

You should've seen it.

Tom should've called.

I should've known.

You should've called.

You should've phoned.

It shouldn't have happened.

You should've waited.

You should have stopped.

I should've declined.

I should have known.

You should have waited.

It should've been mine.

You should've written it down.

Every corporation should have one, and every government should have a Ministry of Detail.

You should have introduced yourself.

You should know better.

You should be more careful.

You should have come home before.

You shouldn't have done it.

You should have listened to me.

You should have listened to me.

No one should have that power.

You should've said so earlier.

I shouldn't have overdone it.

You should have kept that secret.

Tom should have plenty of time.

You should've listened to me.

I shouldn't have eaten so much.

You should have seen him.

You should have seen me.

I should've never come here.

You shouldn't have come back.