Grammar 4 Complete the sentences with the correct form of the verb in brackets.

1 What would you do if you (find) a wallet on the ground?

2 If I were you, I (not / make) a pizza. I’d make lasagne.

3 Timothy (understand) if you explain the problem to him.

4 If you (heat) ice, it melts.

5 If the weather is nice, (you / go) for a walk with me?