八年级下册知识点讲解及必考语法点
2020-03-17 11:04
来源:初中英语
作者:
八. 一般过去时
一般过去时表示在过去某个时间所发生的动作或所处的状态(与现在无关) 。常与yesterday, last week, in 1989, just now, a moment ago, the other day等过去具体时间状语连用。
He was here just now. 他刚才还在这里。
What did you do yesterday? 你昨天做了什么事?
一般过去时基本结构
1. 肯定句形式:主语+动词过去式+其他
I was an English teacher one year ago.一年前我是一名英语老师。
I bought a yellow dress yesterday afternoon.昨天下午我买了一条黄裙子。
2. 否定句形式:①was/were+not; ②在行为动词前加didn't,同时还原行为动词
I wasn't an English teacher one year ago.一年前我不是一名英语老师。
I didn't buy a yellow dress yesterday afternoon.昨天下午我没买一条黄裙子。
3. 一般疑问句:①was/were提到句首;②Did+主语+动词原形+其他?
Were you an English teacher one year ago?一年前你是一名英语老师吗?
Did you buy a yellow dress yesterday afternoon?昨天下午你买了一条黄裙子吗?
4. 特殊疑问句:特殊疑问词+一般疑问句
What were you one year ago?一年前你是做什么的?
九. 一般将来时
一般将来时表示将来某个时间要发生的动作或状态,或将来经常发生的动作或状态。
一般将来时的基本结构
1. will+动词原形
否定式:will not=won't
一般疑问式:will+主语+动词原形+其他?
特殊疑问式:特殊疑问词+一般疑问式?
I will do a better job next time. 下次我要做得好些。
Oil and water will not mix. 油和水没法混在一起。
2. am/is/are going to +动词原形
否定式:am/is/are not going to +动词原形
一般疑问式:am/is/are +主语+ going to + 动词原形+其他?
特殊疑问式:特殊疑问词+一般疑问式?
He is going to spend his holidays in London.他打算在伦敦度假。
Look at the dark clouds. There is going to be a storm. 看那乌云,快要下雨了。
Is he going to collect any data for us? 他会帮我们收集数据吗?
What are you going to do tomorrow?明天你打算作什么?
十. 情态动词
can(能,会), may(可以,可能,也许), must(必须,一定,应该) have to(必须,不得不)
1. 肯定句结构:主语+can/may/must+动词原形+其它,例如:
I must go now.
2. 否定句结构: 在can/may/must后加not,例如:
You mustn’t talk aloud in the library.
3. 一般疑问句结构: 把can/may/must提在主语前,例如:
Must you go now? (Yes, I must. No, I needn’t.) May I open the window? (Yes, you may. No, you needn’t.)
十一. had better用法
had better+动词原形表示“最好做……”,变否定句时在had better后加not。例如:
You had better catch a bus. You’d better not catch a bus. (You had= You’d )
十二. 特殊疑问句的变换
对划线部分提问时,将划线部分去掉,剩下部分变一般疑问句语序。(对主语提问例外)例如:
My name is Lily. What’s your name? The river is 500 kilometres. Hong long is the river?