1) If I were you I WOULD try to work harder.
2) They will go to the beach if it IS sunny.
3) I hope you can {} take part in the school play.
4) You needn't have BROUGHT a present.
5) This book was written BY a student of mine.
6) The town is decorated WITH lights.
7) She SAID she would call later.
8) She will leave before Tony ARRIVES.
9) After they HAD (HAD) a meal, they went out for a walk.
10) You MUST stop when the light is red.