You were good at physics. (past)
The ice will be thick to skate. (future)
Marry was angry with me. (past)
I shall have a new tape-recoder. (future)
She had no time to do it. (past)
We have holidays in summer. (present)
Were you good at physics? (past)
Will the ice be thick to skate? (future)
Was Marry angry with me? (past)
Shall I have a new tape-recoder? (future)
Did she have any time to do it? (past)
Do we have holidays in summer? (present)