八年级英语下册语法知识

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生命是短暂的,空余时间很少,因此我们不应把一刻空余时间耗费在阅读价值不大的书籍上。下面给大家带来一些关于八年级英语下册语法知识,希望对大家有所帮助。puD本库

八年级英语下册语法1puD本库

一般将来时态的应用puD本库

do/does 的一般将来时态形式:(shall/will) dopuD本库

do/does 的一般将来时态的被动语态:(shall/will) be donepuD本库

一般将来时态的肯定句、否定句、疑问句形式:puD本库

肯定句例句:People will have robots in a few years.puD本库

否定句例句:People (will not/won't) have robots in a few years.puD本库

一般疑问句例句:Will people have robots in a few years?puD本库

特殊疑问句例句:What will people have in a few years?puD本库

八年级英语下册语法2puD本库

过去将来时puD本库

一、过去将来时的结构puD本库

should/would+动词原形puD本库

do/does 的过去将来时态形式:(should/would) dopuD本库

do/does的过去将来时态的被动语态:(should/would) be donepuD本库

过去将来时态的肯定句、否定句、疑问句形式:puD本库

肯定句例句:You should write a letter to him.puD本库

否定句例句:You shouldn't write a letter to him.puD本库

一般疑问句例句:Should I write a letter to him?puD本库

特殊疑问句例句:What should I do?puD本库

八年级英语下册语法3puD本库

过去进行时puD本库

do/does 的过去进行时态形式:(was/were) doingpuD本库

do/does 的过去进行时态的被动语态:(was/were) being donepuD本库

过去将来时态的肯定句、否定句和疑问句形式:puD本库

肯定句例句:I was walking down the street when a UFO landed.puD本库

否定句例句:I wasn't walking down the street when a UFO landed.puD本库

一般疑问句例句:Were you walking down the street when a UFO landed?puD本库

特殊疑问句例句:What were you doing when a UFO landed?puD本库

动词 when 和 while 的选择:when 后加瞬间动词,while 后加延续性动词。puD本库

例句:The boy was walking down the street when the UFO landed.puD本库

=While the boy was walking down the street, the UFO landed.puD本库

八年级英语下册语法4puD本库

宾语从句puD本库

结构:主语 + 谓语动词 + 宾语从句(主语 + 谓语动词 + 宾语/表语)puD本库

1、引导名词性从句的连接词puD本库

(1)that:没有含义,在宾语从句中不做成分puD本库

(2)whether/if:表示是否,宾语从句中不做成分。puD本库

I don't know if /whether he still lives here after so many years. 我不知道这么多年后,他是否还住在这里。puD本库

(3)连接代词:what, which, who, whom, whose(在宾语从句中做主、宾、表和定语)puD本库

连接副词:where, when, how, why(在宾语从句中做状语)puD本库

2、在做宾语从句的题目时应注意时态puD本库

(1)当主句是现在时态时,宾语从句可以根据需要使用任何时态。puD本库

He tells me that his sister came back yesterday.他告诉我他姐姐昨天回来了。puD本库

(2)当主句是过去时态时,宾语从句必须是一种过去的时态。puD本库

She asked me if I knew whose pen it was.她问我是否知道这是谁的钢笔。puD本库

(3)当表示客观事实或普遍真理的句子做宾语从句时,任何时候都用一般现在时。puD本库

The teacher said that the earth goes round the sun.老师说过地球绕着太阳转。puD本库

八年级英语下册语法5puD本库

if 引导的条件状语从句puD本库

结构:主句 + if + 条件状语从句puD本库

if + 条件状语从句 + [(comma)] + 主句puD本库

注意:puD本库

在 if 引导的条件状语从句中,主句应用将来时态,状语从句用一般现在时态。puD本库

例句:You'll have a great time if you go to the party.puD本库

=If you go to the party, you'll have a great time.puD本库

八年级英语下册语法6puD本库

现在完成进行时态puD本库

do/does 的现在完成进行时态形式:have/has been doingpuD本库

do/does 的现在完成进行时态的被动语态:have/has been being donepuD本库

现在完成进行时态所应用的场合:puD本库

①某事从过去发生一直持续到现在都在做puD本库

②过去发生的动作对现在造成影响puD本库

I have been making progress since he talked with me that time.自从那次他与我谈过心后,我天天都在进步。puD本库

现在完成进行时态的肯定句、否定句和疑问句形式:puD本库

肯定句例句:I have been skating for five hours.puD本库

否定句例句:I haven't been skating for five hours.puD本库

一般疑问句例句:Have you been skating for five hours?puD本库

特殊疑问句例句:How long have you been skating?puD本库

八年级英语下册语法7puD本库

现在完成时puD本库

一、现在完成时的结构puD本库

主语 + have/has + 过去分词 + 其他.(当主语是第三人称单数时用has,其余人称用have.)puD本库

否定式:主语 + haven't/hasn't + 过去分词 + 其他.puD本库

疑问式: Have /Has + 主语 + 过去分词 + 其他?puD本库

简略答语: Yes, 主语 + have/has.(肯定)puD本库

No, 主语 + haven't/hasn't.(否定)puD本库

二、现在完成时用法、定义详细讲解puD本库

1、表示过去所发生的动作或事情对现在的影响或产生的结果,着眼点在现在,主要强调过去发生的事情对现在的影响。puD本库

He has lost his wallet.他的钱包丢了。puD本库

We’ve had too much rain this year.今年雨水太多。puD本库

2、表示一个从过去某个时间开始,延续到现在,并可能延续下去的动作。puD本库

He has worked here for over twenty years.他在这里工作已有20多年了。puD本库

3、表示说话前发生过一次或多次的动作,现在成为一种经验,一般译为汉语“过”,常带有twice, ever, never, three times等时间状语。puD本库

I have been to Beijing twice.我去过北京两次。puD本库

八年级英语下册语法8puD本库

反意疑问句puD本库

反意疑问句由肯定陈述句加否定问句构成,或者由否定陈述句加肯定问句构成。puD本库

He's a student, isn't he?puD本库

She's not his mother, is she?puD本库

回答反意疑问句时,要根据事实来回答。若事实是肯定的,则必须用 yes 回答。若事实是否定的,则必须用 no 回答。puD本库

---You're not ready, are you?你还没有准备好,对吧?puD本库

---No, I'm not.是的,我没有准备好。puD本库

---Yes, I am.不,我准备好了。puD本库

puD本库

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