①He is very busy with work.→
He is extremely occupied with work.
②After he finished his work, he was very tired. →
Having finished his work, he was always extremely exhausted.
③ My sister studies very hard. It helps her make great progress every day. →
My sister puts her whole heart into study, which helps her make great progress every day.
(1)He didn’t come to the meeting yesterday because he was ill．(一般)
His illness accounted for his absence from the meeting yesterday．(高级)
(2)When he was a child，he wanted to learn everything．(一般)
When he was a child，he had a strong desire for knowledge．(高级)
(3)I’ll thank you if you think about my application．(一般)
I’ll appreciate it if you can take my application into consideration．(高级)
(4)Many people are worried about the problem of air pollution．(一般)
The problem of air pollution has caused wide public concern．(高级)
He works very hard.→
①He makes his efforts to work.
②He does everything he can to work.
③He puts his heart into his work.
④He tries his best to work.