八年级下册英语知识点梳理牛津译林版第一单元二三四五六七八单元
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八年级下册英语知识点梳理牛津译林版第一单元二三四五六七八单元
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10倍速抗遗忘轻松记单词下载
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资料目录
译林版牛津版八年级下册英语单词知识点讲义
译林版八年级英语下册知识点课件ppt
译林牛津八年级下册单元知识点全解及测试卷
Unit 1 Past and present
Unit 2 Travelling
Unit 3 Online tours
Unit 4 A good read
Unit 5 Good manners
Unit 6 Sunshine for all
Unit 7 International charities
Unit 8 A green world
举例
Unit 1 Past and present
Part Four Grammar
重点全解
1、I have already read this book many times. （P 12）
time此处表示“次数”是可数名词。英语中“一次”用once表达，“两次”用twice表达，从三次开始用“基数词+times”表达。
例如：We watch TV four times a week.
2、My parents haven’t come back yet. （P 14）
表示“还，已经”yet常用语疑问句和否定句中，通常位于句末；already用于肯定句中。
例如： Have you received the letter yet?
He has already left home.
3、Oh, I think I have heard about the film. （P 14）
hear about意为“听说（关于某人或某物）”，hear of“听说”，hear from“收到……的来信”相当于receive a letter from。
例如： I have never heard about him.
Do you hear of the movie star?
I hear from my mother every month.
4、Do you plan to see it?（P 14）
plan作及物动词，表示“打算，计划”，plan to do sth.“打算做某事”，plan还可以作名词，make a plan for“为……做计划”。
例如： Do you plan to go to the party.
现在完成时（1）
一、现在完成时的构成
现在完成时是由“助动词 have(has)+动词的过去分词”构成。助动词说明该谓语是属于现在时范围。它和主语的人称、数要保持一致。过去分词是主要的谓语动词，说明句子的意义。
例句：
He has already finished his homework. 他已经做完作业了。
He hasn't finished his homework yet. 他还没有做完作业。
---Has he finished his homework yet? 他已经做完作业了吗？
---Yes, he has./ No, he hasn't. 是的，做完了。/不，还没有。
二、现在完成时的用法
① 表过去发生的某一动作对现在造成的影响或结果。
---Would you like some bread? 你想要一些面包吗？
---No, thanks. I have had my breakfast. 不，谢谢，我已经吃过早饭了。
（对现在的影响：不饿）
---Why don't you drive to your office? 你为什么不开车去办公室啊？
---Because my car has broken. 因为我的车坏了。
（对现在的影响：车没办法开了）
② 表示从过去开始一直持续到现在, 也许还会继续下去的动作或状态。
He has studied English for 6 years. 他已经学习英语六年了。
Mary has been busy since she came back from Hangzhou. 自从从杭州回来，玛丽一直在忙。
三、常和现在完成时连用的时间状语
① 用副词already和yet。already一般用于肯定句中，yet一般用于否定句和疑问句中。
We have already finished our homework. 我们已完成作业了。
They haven't finished their homework yet. 他们还没有完成作业。
② 用ever “曾经”和never“从未”。它们多用于否定或疑问句中。
Have you ever been to the Great Wall? 你曾经去过长城吗？
I have never been to the Great Wall. 我从未去过长城。
③ 用表示到说话为止的过去时间状语，如just, before, up to now, so far, until now, in the past few years等。
I have seen her before, but I can not remember where. 我以前见过她，但记不起在哪里见过。
He has been there three times in the last few days. 近几年他去过那里三次了。
④ 用for+一段时间，since+时间点。
I've lived here for 15 years. 我已经在这里住十五年了。
I've lived here since 15 years ago. 自从十五年前我就住在这里了。
Mr. Green has worked here since he came to China. 自从来到中国，格林先生一直在这里工作。
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