樓主最好能提供變化格式,否則有很多種變化方式.
I was able to catch up my classmate if I worked harder.
= Work harder,and (then) I could catch up with my classmates.
He was keen on sports.
= He liked/loved/enjoyed sports.
He failed in English.
= He didn't succeed in English.
Don’t stay up late.
= No staying up late.
It is rude to point at others.
= To point at others is rude.
I would like to work as an architect.
= I want to be an architect.
He walks with his artifical legs.
= He uses his artificial legs to walk.
How do you deal with the rubbish?
= What do you do with the rubbish?
注：/ 表示可以任意選用其一,（ ）表示其內(nèi)可以省略不寫.