a) I think it (is going to rain) tomorrow. It's very cloudy.
b) When they come in all the children stand up.
c) As soon as they come here, we (shall start) the meeting.
d) When I (am) twenty, I (shall visit) my Hungarian relatives.
e) Has she (ever/helped) you with your projects?
g) She (did not answer) when we (called) her last Sunday.