weak用法和結構

weak在句中可用作表語，也可用作定語。用作定語時，其後可接具體名詞或抽象名詞，作表語時，其後可接介詞短語、動詞不定式或that從句。

例句：

①用作形容詞 (adj.)

用作定語: ～+ n.

She spoke in a weak voice.

她有氣無力地説話。

②用作表語: S+be+～

Her pulse is weak she must be very ill.

她的脈搏微弱，必定病得很厲害。

③S+be+～+ prep .-phrase

She was weak from a long illness.

她因長期生病而十分虛弱。

④S+be+too ～+to- v

The flu victim was too weak to walk.

這位流感病人虛弱得連路都走不動。

⑤S+be+～+that-clause

The teacher's so weak that the children do what they like.

這老師太軟弱了，孩子們因此可以為所欲為。

短語：

weak answer 缺乏説服力的回答

weak character 優柔寡斷的性格

weak coffee 淡咖啡

weak constitution 虛弱的體質

weak defence 不牢固的防禦工作