如果你留下来

if you like───如果你愿意；如果你喜欢的话

if you must───如果你非要……

if you want───如果你想

to outstay───超过

if you ask me───我认为；依我说

if you please───请；对不起

if you must know───如果你一定要知道

If you stay in a room you never see things.───待在房间里是永远看不到什么东西的。

You will fall from the bed and bump your head if you stay naughty.───如果你继续调皮捣蛋，你会从床上摔下来，撞到头。

You can't if you stay in a room," said Mary.───如果你老呆在一个房间里，你就什么也看不见。”玛丽说。

If you stay here, you must listen to me!

You won't complete anything if you stay off.

If you stay out in the rain you'll catch cold!

If you stay around long enough, sometimes you meet one of the stars.

If you stay in the job for more than 10 years, you get stale .

If you stay in the sun too long you'll get heat rash.

There are no bank charges if you stay in credit.

If you stay still, you can hear other people moving towards you long before they can see you.

If you stay after class, I'll go through the theory with you again.