高中英语语法-连词

1、连词 v什么是连词?v用于连接单词，短语或句子的词语并列连词从属连词v表并弄关系的连词：v1. and 和，而且v基本用法：表并列 I like apples and oranges.v祈使句后用and, 有条件句作用v此时and= if you you will Study hard, and you will pass the exam. Go straight, and you will see the library.并列连词并列连词v 2. both and 既也, 两者都 （谓语用复数） Both you and Jim are from England. She can spea

2、k both French and English.v 3. neither nor 既不也不, 两者都不 连接两个并列主语时，谓语动词与最近的主语保持一致。 Neither I nor he likes this song. 并列连词并列连词并列连词v 4Not only but also不但而且 (就近原则) Not only the mother but also the children are ill. He not only washed the clothes but also cleaned the room v 5. as well as 与一样，也1) 用来连接并列的主语时

3、，谓语动词要与前一主语保持一致 Helen as well as I is going to HK next week.2) 如as well as 前是不定式，那其后面也应是不定式，但to省略 Her mother asks her to do the housework as well as (to) look after her sister.v二，表示选择关系的连词v1. eitheror 要么要么 不是就是 (就近原则) Either you or I am going there tomorrow. She is either drunk or mad. Either you or

4、 she attends the meeting.v2. or 还是，或者，否则 Is she a teacher or a student? Hurry up, or we will miss the bus.v3. otherwise 否则 （可与or 互换） Get up quickly, otherwise you will be late for school.v 三，表示转折关系的连词v but 但是 he is old, but he is very healthy.v however 然而，但是，可放在句首，中，末， 通常用逗号隔开，作插入语。 My room is small

5、, however, its very comfortable.v while 然而，而 I am good at swimming while he is good at running.v yet, 然而，可是 He studied hard, yet he fail the exam. v四，表示因果关系的连词vso 因此，所以 （不能与because连用）vtherefore 因此，所以 (比so正式，常与and连用)vfor 因为 v与because的区别： for的句子重心在for前的分句，而because重心在because引导的从句 Its morning, for the b

6、irds are singing. （对，表推断的原因） Its morning, because the birds are singing. （错，因为鸟叫不是天亮的直接原因）v但可以说the birds are singing because its morning.v 用以引导名词性从句和状语从句的连词，由从属连词所导的句子叫从句。v 引导时间状语从句的：when, while, as, before, after, until, till等 v when用来引导长时间的从句时， 从句中用短暂性动词；用来引导长时间的从句时，用持续性动词。当从句的主语与主句的主语相同时，be动词可省略

7、When I got home, my family were already having dinner. （when表示点时间） When they were still talking and laughing, the teacher came in. （when表示时间段） When ( you are) in trouble, ask him for help.从属连词从属连词v while用来引导延续性动作或状态的从句，强调主从句的动作同时发生或持续。v while通常表示一段时间，从句中要用持续性动词作谓语。 she fell asleep while she was read

8、ing the newspaper.v while有时可以作并列连词，表示对比，可译成然而。 I am fond of English while he likes math.v as 引导的从句中多用表示动作的动词，不用be动词，且多是短暂性或发展变化的情况，可理解为“随着”v as表示点时间时，从句中用短暂性动词；表示段时间时，用持续性动词。as和when两者经常可以通用。 The thief was caught as/ when he was stealing in the supermarket.v as表示 一边一边，强调从句和主句中两个动作交替进行或同步进行。 They talk

9、ed as they walked. v as表示随着 As time goes on, its getting warmer and warmer. v 表示在之前或在之后， before & after Turn off the light before you leave. I often play computer after finishing my homework.v 表示自从，直到 since &until She has studied very hard since she came to our school.v 两者区别：1. till不能用于句首 2.

10、 用在否定句中，表示直到才， 这个动作直到untill所表示的时候才发生。 Until you told me, I have no idea of it. Jim doesnt go to bed until/till his mother is back.v 表示一就 as soon as, once I will tell you as soon as I hear from her. Once you begin you must persist. v引导原因状语从句的: because, since, as, forvbecause 表直接原因，语气最强，用于回答why的问题，一般放

11、在主句后，也可单独使用 I studied at home because I am tired.vsince 表示的原国是大家已知，或显然的，强调说话者和听者都知道，也可译为“既然” Since everyone is here, lets start. vas 表示的原因为大家已知，可译为由于，从句说明原因，主语说明结果 As its raining, we take a taxi to go home.vfor 表推测的原因，句子重心在for前的分句，也可以表示对主句的看法或解释。 It is going to rain, for its getting dark. He may be

12、ill, for he is absent today.v1for 是并列连词，只用于连接表示原因的分句，因此不能用于句首。because表示原因时，可位于句首。 【误】For he did not obey the rules, he was punished. 【正】Because he did not obey the rules, he was punished.v2for 表示的是推断解释，because强调动作发生的直接原因。v It must have rained last night, for the ground is wet. (不可用because，因为地面湿不是天下雨

13、的原因） because 和for的区别 vThe day breaks, for the birds are singing. (不可用because，因为鸟叫不是天亮的原因）v He went to bed early, because he was tired (直接的理由)v He must be tired, for he went to bed early. (间接的推断)because 和for的区别 v引导条件状语从句的连词: if, unless, as long asvif 如果，表示在某种条件下某事会发生，也可以表虚拟或假设 If you ask him, we will

14、 help you. If I were you, I wont do that.vas long as 只要 Nothing is impossible as long as we try. There isnt any orange in the bottle.v unless= if not, 表示反面条件，如果不、除非。 They will go tomorrow unless it rains. =（They will go tomorrow if it doesnt rain.） I wont let you in unless you show me your pass.（= I

15、 wont let you in if you dont show me your pass. ）v引导目的状语从句的：in order that, so thatv1. in order that 为了，以便 They took a taxi in order that they could save time.v 2. so that 为了，以便 I got up early so that I could catch the first bus.v引导结果状语从句的：so that, suchthat v1. so + 形/副 that I am so tired that I cant

16、 walk any longer.v 2. such +名/短语 that It was such a warm day that we went out for a walk.v 注意：such+a/an+形容词+单数名词结构v = so +形容词+a/an+单数名词结构 He told us such a funny story that we all laughed. He told us so funny a story that we all laughed. v六，引导让步状语从句的：although, though, even though, even ifvalthough, though 虽然，纵然， 不能与but 连用， 但可与yet连用valthough 较正式，不可作副词 Although/thou