1 if the train leaves London at twelve, it will be here at two
2 if Lucy calls me, i will ask her to come with us
3 if you don't want to play tennis, we will do something else
4 if you need a tennis racket, i will lend to mine
5 if my brother doesn't be busy, he will play with us
6 if my dad finihes work early, he will drive us to the sports center
7 if it rains , we will stay at home
8 if you are interested , i will show you my paintings
9 if you like my paintings, i will graw a picture of you
10 if Matt lets us use his computer, we will visit Jo's new website