Copy the sentences putting in the verbs in the right form:
1.What ... you... If your friend... you his birthday? (to say, to invite)
2.If i... you, I... not... so. (to be, to do)
3.If you... to the doctor you... what medicine to take. (to Go, to know)
4.They... ... ... for the examination better if they... ... about it earlier. (to prepare, to know) ​

1. What ... you... If your friend... you his birthday? (will, say, invites)

2. If I .. you, I... not... so. (were, would, do)

3. If you... to the doctor you... what medicine to take. (go, will know)

4. They... ... ... for the examination better if they... ... about it earlier. (had prepared, had known) ​