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
①I’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 )
②If 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 ).
28．do sb a/the favor 替换 help
Would you please do me the favor ( help me ) to turn down the radio?
29．the other day 替换 a few days ago
The other day my brother and I went to the cinema by bicycle. ( NMET 1997 )
30．in the course of 替换 during
In the course of (During) the mountain-climbing, please help each other and pay special attention to your safety.