楼上的有些拼写错误没改过来,还有第三人称单数也没注意,在各题里.正确的应该是:
He often helps his mother to wash clothes after he finishes his homework.
If it rains tomorrow,we will not go to the park.
He will learn Chinese before he comes to China .
I will let you know as soon as he arrives home .
We will not leave here until you are back.
Jim wants to travel around the world when he leaves school.