将下列句子进行同义句改写,每空一词（含缩写）
1.If you don't stop dancing,you'll get tired.
If you ______ ______,you'll get tired.
2.I will not be able to finish the work if you don't help me.
I ______ finsh the work ______ ______ help.
3.Get up early,or you'll be late for the meeting.
_______ you _____ get up early,you'll be late for the meeting.
4.Why is he always laughing?
Why is he laughing ______ ______ ______