I can't find my keys anywhere. I … them in the supermarket. In fact, I’m sure of it. I’ll go and look.

You’ve been dancing for three hours.

He … his homework yet. He only started ten minutes ago.

I spent the whole day with Joe. I'm sure he didn’t commit any crime.

The party has already started, but most of the guests haven’t appeared yet.

Clara hasn't come to school - I don’t know why.

… you answer these science questions?

I think we … solve many mathematical problems in the future.

I’m tall so … see most of the game from the back of the crowd.

Ivan … speak Japanese, so he failed to understand what the tourist was saying.