文档介绍：一般现在时
一般过去时
一般将来时
现在完成时
现在进行时
过去完成时
.
I know that he is from Germany.
he came here yesterday.
he will visit the Great Wall.
he has visited the Summer Palace.
he is learning Chinese from you.
he had been to China twice by 2009
I know that he is from Germany.
I knew that he was from Germany.
I know that he came here yesterday.
I knew that he came here yesterday.
I know that he will visit the Great Wall.
I knew that he would visit the Great Wall.
I know that he has visited the Summer Palace.
I knew that he had visited the Summen Palace.
I know that he is learning Chinese from you.
I knew that he was learning Chinese from you.
I know that he had been to China twice by 2009.
I knew that he had been to China twice by 2009.
Can you tell me...?
What day is it today?
Can you tell me what day it is taday?
What is the weather like ?
Can you tell me what the weather is like ?
What does your father do?
Can you tell me what your father does?
Where ha