[if+ clause, + clause clause + if+ clause]
- If you eat too much you get fat. You get fat if you eat too much.
- If you want to learn a musical instrument, you have to practise.
If that was Mary, why didn’t she stop and say hello?
If you don’t like hot weather, you’ll be unhappy in Texas.
- If I have enough time tomorrow, I ‘II come and see you.
(NOT If I will have enough-ttme .. .)
I’ll give her your love if I see her.
(NOT . . . if I will see her. )
We can use [if + .will] in polite requests, but the meaning is not really future.
- If you will come this way, I’ll take you to the manager’s office. (= If you are willing to come this way, . . .)