2 forget doing/to do forget to do 忘记要去做某事。 (未做) forget doing 忘记做过某事。 (已做) The light in the office is stil on. He forgot to turn it off. 办公室的灯还在亮着，它忘记关了。...

特殊词精讲 1 stop doing/to do stop to do 停止，中断做某事后去做另一件事。 stop doing 停止做某事。 They stop to smoke a cigarette.他们停下来，抽了根烟。 I must stop smoking. 我必须戒...

8 what/whatever;that/what; who/whoever 1）what = the thing which；whatever = anything What you want has been sent here. Whatever you want makes no difference to me. 2) who= the person that whoever= anyone who （错）...

7 先行词和关系词二合一 1)Whoever spits in public will be punished here. (Whoever 可以用 anyone who 代替) 2)The parents will use what they have to send their son to technical school. (what 可以用all that代...

6 as, which 非限定性定语从句 由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。 As we know, smoking is harmful t...

5 介词+关系词 1）介词后面的关系词不能省略。 2）that前不能有介词。 3） 某些在从句中充当时间，地点或原因状语的介词+关系词结构可以同关系副词when 和where 互换。...

4 限制性和非限制性定语从句 1) 定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句是先行词...

3 判断关系代词与关系副词 方法一： 用关系代词，还是关系副词完全取决于从句中的谓语动词。及物动词后面无宾语，就必须要求用关系代词；而不及物动词则要求用关...

2 关系副词引导的定语从句 关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。 1）when, where, why 关系副词when, where, why的含义相当于介词+ which结构，因...

1 关系代词引导的定语从句 关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的...