need/want/require/worth 注意：当 need, want, require, worth(形容词)后面接doing也可以表示被动。 Your hair wants cutting.你的头发该理了。 The floor requires washing. 地板需要冲洗。 The book is worth re
被动形式表示主动意义 be determined, be pleased, be graduated (from), be finished, be prepared (for), be occupied (in), get marries He is graduated from a famous university. 他毕业于一所有名的大学。
不用被动语态的情况 1) 不及物动词或动词短语无被动语态： appear, die disappear, end (vi. 结束), fail, happen, last, lie, remain, sit, spread, stand,break out, come true, fall asleep, keep silence, lose
表示 据说 或 相信 的词组 believe, consider, declare, expect, feel , report, say, see, supp ose, think, understand It is said that 据说 It is reported that 据报道 It is believed that 大家相信 It is
短语动词的被动语态 短语动词是一个整体，不可丢掉后面的介词或副词。 This is a photo of the power station that has been set up in my hometown. My sister will be taken care of by Grandma. Such a thing ha
分词作插入语 其结构是固定的，意思上的主语并不是句子的主语。 generally speaking一般说来 talking of (speaking of) 说道 strictly speaking 严格的说 judging from 从 判断 all things considered 从整体来看 t
分词作状语 As I didn t receive any letter from him, I gave him a call. - Not receiving any letter from him, I gave him a call. 由于没有收到他的信，我给他打了电话。 If more attention was given, the t
表示转折或对比 1) but表示转折，while表示对比。 Some people love cats, while others hate them. 典型例题 --- Would you like to come to dinner tonight? --- I d like to, ___ I m too busy. A. and B. so C.
表示选择的并列结构 1) or意思为 否则 。 I must work hard, or I ll fail in the exam. 2) either or意思为 或者 或者 。注意谓语动词采用就近原则。 Either you or I am right. 点击查看万博体育app：：万博体育app：语法知识 奥
比较and和or 1) 并列结构中，or通常用于否定句，and用于肯定句。 2) 但有时and 也可用于否定句。请注意其不同特点： There is no air or water in the moon. There is no air and no water on the moon. 在否定中并
表示 一 就 的结构 hardly/scarcely when/before, no sooner than和as soon as都可以表示 一 就 的意思，例： I had hardly / scarcely got home when it began to rain. I had no sooner got home than it began t
