We don’t allow students to smoke.
4.动词need, require, want 作“需要解时,其后必须用动名词的主动形式或不定式的被动形式作宾语,表示事情需要做。这时动名词的主动式表示被动意义。be worth 后必须用动名词的主动形式表示被动意义。此外,若动词need 表“需要,require 表“要求,want 表“想要这些意义时,其后须接名词或代词作宾语,然后接不定式作宾语补足语。即:
need / require / want doing / to be done
need / require / want sb. to do sth.
be worth + n. (表示钱数或相当于钱数的名词)
be worth doing be worthy of being done
be worthy of + n. 值得…… be worthy to be done
如:The window needs / requires / wants cleaning.
The window needs / requires / wants to be cleaned.
窗户需要擦一下。
The place is worth visiting.
The place is worthy of a visit.
The place is worthy of being visited.
The place is worthy to be visited.
那个地方值得一去。
如:① only one of these books is worth reading.
② — What do you think of the book ?
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