if

如果明天下雨，我们就待在家里。

___If it rains tomorrow, we will stay at home.

如果你努力学习，你会通过考试的。

___If you study hard, you will pass the exam.

如果你愿意，我可以开车送你去那里。

___If you like, I could drive you there.

如果我没有得到足够的睡眠，我会头痛。

___If I don't get enough sleep I get a headache.

你能告诉我是否还有牛奶吗？

Can you tell me ___if there is any milk left?

我想知道他们是否会准时到达。

I wonder ___if they will arrive on time.

如果我是你，我可能会去。

___If I were you, I'd probably go.