17. cannottoo结构,cannottoo意为It is impossible to overdo或者,即无论怎样也不算过分。not可换用hardly,scarcely等,too可换用enough,sufficient等
You cannot be too careful.
18. 否定+but 结构,在否定词后面的but,具有which not,who not,that not,等等否定意义,构成前后的双重否定。可译成没有不是或都等
Nothing is so bad but it might have been worse.
19. 否定+until (till)结构,在否定词no,not,never,little,few,seldom等的后边所接用的until/till,多数情况下译为直到才,要才,把否定译为肯定。
Nobody knows what he can do till he has tried.
20. not sobut和not such a but结构,这两个结构和否定+but的结构差不多,不同之点是这两个结构中的but是含有thatnot意味的连续词,表示程度。可译为还没有到不能做的程度,并不是不,无论怎样也不是不能等。
He is not so sick but he can come to school.
21. 疑问词+shouldbut 结构,这个结构表示过去的意外的事,意为nonebut,可译为除了还有谁会,岂料,想不到竟是等。
Who should write it but himself?
22. who knows but (that)和who could shouldbut结构,这个结构是反问形式,一般意译为多半,亦未可知等等,有时也可直译。
Who knows but (that) he may go?
23. 祈使句+and和祈使句+or结构,祈使句+and表示Ifyou,祈使名+or表示ifnot,you。
Add love to a house and you have a home. Aad righteousness to a city and you have a community. Aad truth to a pile of red brick and you have a school.
24. 名词+and结构,在这个结构中,名词等于状语从句,或表示条件,或表示时间。
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