The shirt is too small for me to put on.复合句
The shirt is so small that i can not put on
They didn't decide what they should do 简单句
They didn't decide what to do
Tom came to Yantai five years ago ,and now he's still in China.同义句
Tom _has __ _been___in ____ Yantai for five year
I went home after I finished my homework.
I__did;t_ __go__ home__until___ I finished my homewok
变为一般疑问句：The two students have finished their homework already
Have the two students finished their homework yet ? 我保证完全正确,包你满意