用单词所给适当形式填空
She_____to the Great Wall several times.(go)
Great changes_____in our country since 1978.(take place)
Tim_____from here for about two hours.(be away)
The film_____on for nearly fifteen minutes.(be)
将下列句子改为现在完成时
What is he doing?
Are you washing the clothes?
He is not writing a poem.
They are drinking beer in the pub.
goes
took place
has been away
was
what has he done?
Have you washed the clothes?
He has not written a poem.
They have been drinking beer in the pub.
When__are__you going ton return the book to the library?
Next week.I__am__still reading it now.
用单词所给适当形式填空
She has gone to the Great Wall several times.(go)
Great changes have taken place in our country since 1978.(take place)
Tim has been away from here for about two hours.(be away)
The film has been on for nearly fifteen minutes.(be)
将下列句子改为现在完成时
What is he doing?
What has he been doing?
Are you washing the clothes?
Have you been washing the clothes?
He is not writing a poem.
He hasn't been writing a poem.
They are drinking beer in the pub.
They have been drinking beer in the pub.
以上四句都是改为了现在完成进行时，因为原句是现在进行时；
这个时态需要好好理解，它的意思是：从过去的某一个时间开始的动作，一直进行到现在，现在还在进行着，并且有可能持续到将来。