Bill Gray drives a taxi in this city.
Bill Gray's job is to drive a taxi in this city.
The Chinese people spent more than 10years building the Great Wall.
It took the chinese people more than 10years to build the Great Wall.
Titanic was so big that it could hold 2,200 people.
Titanic was big to hold 2,200 people.
You can't finish the job in such a short time.
It's a short time for you to finish the job.
Jenny is helping the old lady with her heavy basket.
Jenny is helping the old lady to carry her heavy basket.
动词不定式就是 to do sth.表示目的,将来,等等