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1、Adverbs & Adverbial Clauses2,Grammar,3,2. 表示时间先、后时, 即主句的谓语动作发生在从句之前或之后。连词有：after(在之后), before(在之前)。 After the children had gone to bed, she began to prepare her lessons. He had learned English for three years before he went to London.,3,2. 表示时间先、后时, 即主句的谓语动作发生在从句之前或之后 主要连词有：after(在之后), before(在之前)。
2、After the children had gone to bed, she began to prepare her lessons. He had learned English for three years before he went to London.,before 引导状语从句的多种含义 “才” 强调从句中谓语动作发生慢: The big fire lasted four hours before the firemen brought it under control. “还没来得及就” 强调主句中谓语动作发生快: Before I could figure out wha
3、t had happened, he forced me into the car. 3.趁 Youd better write the phrases down before you forget them.,3,2. 表示时间先、后时, 即主句的谓语动作发生在从句之前或之后 主要连词有：after(在之后), before(在之前)。 After the children had gone to bed, she began to prepare her lessons. He had learned English for three years before he went to Lo
4、ndon.,before 引导状语从句的多种含义 不知不觉多少时间已过去了 He was so absorbed in his work that four hours had passed before he knew it. before 常用于 “It was / will bebefore(要)过多久才” 和 “It wasnt / wont bebefore没有过多久就”句型中 It will be another five days before we finish this task. It was not long before I forgot it all.,3,3. 表示
5、习惯性、经常性, 即从句描述的不是一次性动作, 而是经常发生的习惯性动作。连词有every time(每次), each time(每次), whenever(每当)等。 Whenever we met with difficulties, they came to help us. Each time he came to town he would visit our school. Every time I went to his house, he was out.,3,Things went well until / till one night an accident happen
6、ed. I knew nothing about it until / till he told me.,3,4.表示持续性或瞬间性 主要连词有：since(自从), ever since(自从), until(直到才 / 为止), till(直到才 / 为止)常用句型: It is / wassince Things went well until / till one night an accident happened. I knew nothing about it until / till he told me.,until与till及 notuntil / till的用法 unti
7、l和till都可表示“直到为止”, 与持续性动词的肯定式连用。 He waited until / till we finished our meal. 当until和till表示“直到才”时, 通常与短暂动词的否定式连用, 这时, until和till含有before的意思。 I didnt leave until / till she came back.,3,4.表示持续性或瞬间性 主要连词有：since(自从), ever since(自从), until(直到才 / 为止), till(直到才 / 为止)常用句型: It is / wassince Things went well
8、until / till one night an accident happened. I knew nothing about it until / till he told me.,3.until引导的从句可以放在主句之前或主句之后, 但till从句一般不放在句首。 Until he told me, I knew nothing about it. 4.当not until位于句首时, 用倒装语序： Not until she came back did I leave.= I didnt leave until she came back. 5.在强调句型中一般用until, 不用t
9、ill。 It was not until she took off her dark glasses that I realized she was a famous film star.,It was five years after the war before the country took on a prosperous look. 战争结束5年后国家才开始复苏。 It will be 3 years before these trees begin to bear fruits. 要过3年这些果树才能结果。,句型区别：Itbefore; Itwhen; Itsince,A. It
10、 was+long/时间段+before(did) 过了多久才 It will be+long/时间段+before(do/does) 要过多久才,否定式： It was not+long/时间段+before(did) 没过多久就 It will not be+long/时间+before(do/does) 不要过多久就 It wasnt long before he finished the work. It wont be long before we say goodbye to the teachers and classmates and go to university.,句型区
11、别：Itbefore; Itwhen; Itsince b. It is+时间段+since(did) 自从以来，有多久了 It is more than two years since I came to study in this school. 我来这个学校上学已经有两年多了。 c. It was+时间点+when 当的时候，时间是 It was midnight when he came back from the party. 他聚会结束回到家时已经是半夜了。,before,I explained the sentence for three times _ he understoo
12、d me. Two weeks _ she got divorced, she left her hometown to start a new life. He swallowed the tablets _ I could stop him. Get down to studying _ it is too late. Dont leave _ the rain has stopped.,after , before , until,before,before,after,until,3,4.表示持续性或瞬间性。连词有：since(自从), ever since(自从), until(直到
13、才 / 为止), till(直到才 / 为止) 常用句型: It is / has beensince It is just a week since we arrived here. You have been reading to me ever since James went out. The big clock which used to strike the hours day and night was damaged during the war and has been silent ever since. (ever since可以放在句末, since则不能),1. Ri
14、ce grows well where there is plenty of rain and sunshine. 在阳光水分充足的地方，稻谷生长良好。 2. Hankou lies where two rivers meet. 汉口处于两江交汇处。 3. When travelling where the customs are foreign to your own, do as Romans do. 到风俗习惯有别于家乡的地方去旅行，要入乡随俗。 4. Put it where it belongs. 把它放在原来的位置。 5. Make a mark wherever you have
15、 any question. 在有疑问的地方做个记号。,where(在的地方), wherever(无论哪里),区别 where引导的定语从句、名词性从句、状语从句 Tell me the address where he lives. 告诉我他的住址。 Its where you put it. 它就在你刚才放的地方。 Youll find it where it was. 你可以在刚才放它那地方找到它。,(定语从句),(名词性从句),(地点状语从句）,3,Wuhan lies where the Yangtze and the Han River meet. Youd better mak
16、e a mark where you have any questions. He would keep in touch with us wherever he was. Where there is water, there is life. Where there is love, there is also wealth and success.,请你判断以下哪个是定语从句, 哪个是地点状语从句。 AShall we have a party where we met last Sunday? BHave you been to the island where there are many monkeys? CPlease put all these
