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He has not yet_returned.He will return in ten minutes.
He is not back yet. He will be backin ten minutes.
A new play is being performed at the Globe Theatre.
A new playi is on)at the Globe Theatre.
When the concert ended, we went home.
When the concert was over, we went home.
They will leave very early tomorrow morning
They will set out/set off very early tomorrow morning.
You can't take the exam yet. You are not capable of it.
You can't take the exam yet. You are not up it.
He will be absent from home for two months.
He will be away from home for two monih.
