八年级人教版英语下册unit3知识点
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八年级人教版英语下册unit3知识点
Unit 3 Language in use
一、句型结构
1. What did you do…?
A: What did you do yesterday?
B: I cleaned my room.
2. What was …like?
A: What was the weather like yesterday?
B: It was warm and sunny.
3. When did …?
A: When did you finish your homework?
B: I finished it at nine o’clock last night.
4. How was …?
A: How was your weekend?
B: It was great! I went to the park and played basketball with my
friends.
二、动词时态
1. 一般过去时：表示过去经历或已经完成的动作或状态。
I walked to school yesterday.
She watched a movie last night.
2. 过去进行时：表示过去某一时刻正在进行的动作。
We were playing basketball at six o’clock yesterday evening.
They were studying English when the teacher came in.
3. 过去完成时：表示过去的某个时间或动作之前已经完成的动作。
He had finished his homework before he went to bed.
I had never been to Shanghai before last year.
三、被动语态
被动语态的构成：be动词（am、is、are、was、were）+过去分词。
1. 一般现在时被动语态:
The apples are picked by the farmers.
2. 一般过去时被动语态:
The book was written by Li Bai.
3. 现在进行时被动语态:
The dishes are being washed by my sister.
四、语态转换
主动语态变被动语态，被动语态变主动语态。
1. 主动语态变为被动语态：
步骤：1.将宾语提到主语前，2.加上适当形式的be动词（am、is、are、was、were），3.将原句中的主语变为by的宾语。
例如：I ate an apple. （被动语态）An apple was eaten by me.
2. 被动语态变为主动语态：
步骤：1.将句子中的by的宾语变为主语，2.变成相应的主动语态时态，3.根据句意确定主语。
例如：The book was written by Li Bai. （主动语态）Li Bai wrote
the book.
五、代词
1. 主格代词：I、you、he、she、it、we、they。
2. 宾格代词：me、you、him、her、it、us、them。
3. 形容词性物主代词：my、your、his、her、its、our、their。
4. 名词性物主代词：mine、yours、his、hers、its、ours、theirs。
六、名词性从句
名词性从句就是在主句中充当一个名词的从句。名词性从句一般包括三种：
1. 主语从句：从句作主语。
What you said is right.
It is important that we learn English well.
2. 宾语从句：从句作宾语。
He said that he would come to my birthday party.
I don’t know what you mean.
3. 表语从句：从句作表语。
What she needs is a good rest.
The problem is how to solve it.
