21.can not but / can not help but替换have to do

I could not but (had to) go home.

22.more often than not替换usually

More often than not (Usually), the meaning of many words can be easily guessed.

23.lest替换so that /in order that

I wrote down his telephone number so that I would not forget it. →

I wrote down his telephone number lest I (should) forget it.

24.be long for sth. / be long to do sth. 替换want to do sth./wish for

I want to see you very much. →

I am long to see you.

25.be caught up in/be crazy about/be absorbed in/be addicted to替换be interested in

He is caught up in ( very interested in ) collecting stamps.

26.more than替换very

① I’m very glad to learn that you are coming in September. →

I’m more than glad to learn that you are coming in September. ( NMET 2003 )

② If there is anything I can do for you, I would be more than glad to help.(2004全国卷)

27.perfect (ly) 替换good/ very well

He speaks perfect ( good ) English./ He speaks English perfectly ( very well ).