人教版初中英语九年级第七单元语法

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2020年11月29日16:03:47 1485字阅读4分57秒

语法:被动语态被动语态的用法:   

1.一般现在时的被动语态构成:is / am / are + 及物动词的过去分词

Our classroom is cleaned everyday.

I am asked to study hard.

Knives are used for cutting things.

  1. 一般过去时的被动语态构成:was / were + 及物动词的过去分词

A new shop was built last year.

Dinosaur eggs were laid long long ago.

  1. 现在完成时的被动语态构成:has / have + been + 及物动词的过去分词

This book has been translated into many languages.

Many man-made satellites have been sent up into space by many countries.

  1. 一般将来时的被动语态构成:will+ be + 及物动词的过去分词

A new hospital will be built in our city.

Many more trees will be planted next year.

  1. 含有情态动词的被动语态构成:情态动词+ be + 及物动词的过去分词

Young trees must be watered often.

Your mistakes should be corrected right now.

The door may be locked inside.

Your homework can be handed in tomorrow.

  1. 现在进行时的被动语态构成:am / is / are + being + 及物动词的过去分词

Uncle Wang is mending my bike now.→   My bike is being repaired by Tom now.   They are planting trees over there. →   Trees are being planted over there by them.

  1. 不定式的被动语态:to + be + 及物动词的过去分词

There are two books to be read. →   There are twenty more trees to be planted.二、 怎样把主动语态改成被动语态?

把主动语态改为被动语态非常简单,可以遵循以下几个步骤:

  1. 先找出谓语动词;
  2. 再找出谓语动词后的宾语;
  3. 把宾语用作被动语态中的主语;
  4. 注意人称、时态和数的变化。

例:1. Bruce writes a letter every week. →A letter is written by Bruce every week.   2. Li Lei mended the broken bike this morning.→The broken bike was mended by Li Lei this morning.

  1. He has written two novels so far.→Two novels have been written by him so far.   4. They will plant ten trees tomorrow.→Ten trees will be planted by them tomorrow.   5. Lucy is writing a letter now.→A letter is being written by Lucy now.
  2. You must lock the door when you leave.→the door must be locked when you leave.   三、 使用被动语态应注意的几个问题:  
  3. 不及物动词无被动语态。

What will happen in 100 years.

The dinosaurs disappeared about 65 million years ago.

  1. 有些动词用主动形式表示被动意义。
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