B3M2语法答案不全

1、.高一年级英语学科导学案Book 3_Module 2_第四课时学习目的：1. 连词的定义及其常见的用法。2 .学会从所学句子中归纳语法规那么，并可以灵敏运用。重点难点：如何使用but, however, and, although, while.a. but and howeverbut 作为并列连词，在意义上起转折作用。 but 前后的两个句子或短语在意义上形成鲜明对照。例如： 1 He is old but strong. _ 2 Learning the guitar isnt difficult, but you will have to practise._however 意为“可

2、是，然而，尽管，较 but 的意味弱，通常用作连接性状语。1. 其位置可以在句首，句末或插入句中。2.当其被用来对照两个分句时，中间需要有一个逗号；3.当它被用作句子的插入语时，那么前后应各有一个逗号。例如： 1 However，we need not do that now. _ 2 He said it was so；he was mistaken，however. _ 3 His friends，however，had other ideas. _注： however 也可用作连接副词，意为“不管怎样，用来引导让步状语从句。例如：However we may do it，it will

3、be a difficult job. 无论雪下得多大，我们都必须回去。b. although and while While表示两个事实之间的转折比照，although可以用but改写成另一种句子while 用作连词时，连接两个并列句子，表示“比照关系。例如：He went out for a walk， while I stayed at home._I like singing while she likes dancing._although引导的从句放在主句前后均可，有时还可放在句中。 He often helps me with my English although he is

4、quite busy. 尽管他相当忙，但是还常常帮我学英语。 although引导的从句不能与but, however连用，不能说：Although he was old, but he worked hard. 应把but去掉。c. Conclusion1. but与 however一样点：都表示转折，都可以连接两个句子不同点: but还可连接两个并列的成分，however不能；however可置于句首，句中，句末，而且在句中时前后用分号或逗号隔开的情形较多。but往往置于句首，无需用标点符号与句子隔开。2. although与 while一样点：都是连词，都可引导让步状语从句；不同点：al

5、though意为“虽然，尽管，相当于though，所引导的句子通常置于句首。含although从句的复合句可以转化为由but引导的并列句，但although与but不能同时出现；while意为“然而，但是，可用作并列连词，表示前后的比照，一般不与but转换，所引导的句子不能置于句首。Step 3 Practicea. 用 but， and 和 however 填空：1. Id like to go with you， _， my hands are full.2. Im sorry， _ I wont be able to come tonight.3. We must finish the

6、job in time _ hard it is.4. They will supply food _ drink on Saturday.5. It looked like rain. _， it is clear now.6. Building has started _ the project will be finished by 2019.b. 用but, however, while, although 填空。1. I can not speak Russian _ my little daughter can.2. I think there may, _, be some other reasons we dont know about.3. My brother decided to go to that dangerous place, _ I asked him not to.4. The boy had said he wouldnt do it again, _ he broke his promise. 5. He didnt turn on the light, _ it was very dark in the room.Suggested answers:1. however 2. b