1) I (can/ come back) later if you are busy.

2) I'd come out, if I (not/ feel) so tired.

3) I would have worked much harder if (want)

4) If you could live anywhere in the world, I (choose) Paris.

5) If I (work) harder, I would have passed the exam.

6) If the police question me, I (tell) them the truth.

7) Unless we (leave) now, we will miss the start of the film.

8) She would not have stolen the money if her children (not/be) hungry.

9) I (not/go) to the party unless you go too.

10) If people did not use their cars so much, it (be) traffic jams.