深圳八年级上英语期末复习(7-8)

期末复习（Unit 7-Unit 8）

Unit 7 Memory

一．重点单词

二．重点短语

三．词性转换

四．同义词

五．语法-条件状语从句

（一）if引导的条件状语从句

1.含义

由一个主句和一个或一个以上的从句构成的句子叫复合句，在复合句中，做状语的句子叫做状语从句。状语从句根据它表达的意思可以分为很多种。在主从复合句中修饰主句中的动词、形容词、副词等的从句叫做状语从句，状语从句一般可分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、结果状语从句、条件状语从句、让步状语从句、比较状语从句和方式状语从句九种。而if引导的从句在复合句中做条件状语，因此叫做条件状语从句,表示某种条件下，某事可能发生。

If we pay much attention to the earth, we'll have a better world.

If you don’t hurry, you’ll be late.

2.位置

If引导的条件状语从句在句中的位置比较灵活，可以放在主句前，这时主句和从句之间用逗号隔开，也可以放在主句之后，中间不用逗号隔开。

如果你问他，他会告诉你答案。

I hope to visit her if I’m free.

3.if引导的条件状语从句中从句与主句的时态。

(1)if从句用一般现在时，主句用一般将来时

翻译：如果他用跑的，他就会及时赶到那儿。

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The cat will scratch you if you pull her tail.

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(2)if从句用一般现在时，主句用情态动词may/might/can/must/should

If the fog gets thicker the plane may/might be diverted.

翻译：如果雪停了，我们就可以出去。

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如果你想减肥，你就必须吃更少的肉。

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(3)if从句用一般现在时，主句用一般现在时

翻译：如果把冰加热，它就会化成水。

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(4)if从句用一般现在时，主句是祈使句。

翻译：如果你没有完成你的家庭作业，你就不许去踢足球。

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Please put your hands if you have any questions.

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4.if引导的条件状语从句与祈使句同义转化

If you work hard, you will pass the exam easily.

=Work hard, .

If you don’t hurry up, you will miss the train.

=.

（二）unless引导的条件状语从句

Unless意为―‖，相当于―‖。unless引导的条件状语从句表示强烈的否定，主句也可以含有情态动词或者是祈使句。

翻译：如果他不请我去，我就不去。

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Don’t come in unless I call you.

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你不更加努力的工作，你就会失败。

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你将会有好的学习成绩，除非你不做作业。

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六．同步训练

I.词汇测试

i.根据句意，选择与划线部分意思最接近的选项。

1. — Our team failed (失败) in the football game.

—Don’t mention this matter in front of me. That makes me sad.

A. fall into

B. take in

C. refer to

2. — There are four methods for you to solve this problem.

— OK. Thanks.

A. dreams

B. ways

C. secrets

3. — Mr Li, what should I do first?

—You should imagine an animal in your mind.

A. hand

B. arm

C. brain

4. —Let’s go swimming in the river, Jack!

—What a silly idea! It is snowing outside now.

A. great

B. foolish

C. terrible

5. — Who is your best friend?

—Nancy. She often helps me when I get into trouble.

A. games

B. habits

C. difficulty

6. — Oh, these two pictures are the same.

—No, they are just similar. There are some differences between them.

A. nearly the same

B. very different

C. the same

7. — Look! There are many empty bottles on the street!

—Yes. We should do something to improve our living environment.

A. make ... bigger

B. make ... worse

C. make ... better

8. — Turn off the tap (水龙头). The water is pouring out.

—OK. I didn’t notice it just now.

A. running out

B. looking out

C. taking out

ii.从下面每小题的A、B、C三个选项中选出最佳答案。

9. If you __________ a word, you say it letter by letter.

A. double

B. lose

C. spell