語法：被動語態被動語態的用法：

一般現在時

1.的被動語態構成：is / am / are + 及物動詞的過去分詞

Our classroom is cleaned everyday.

I am asked to study hard.

Knives are used for cutting things.

一般過去時

的被動語態構成：was / were + 及物動詞的過去分詞

A new shop was built last year.

Dinosaur eggs were laid long long ago.

現在完成時

的被動語態構成：has / have + been + 及物動詞的過去分詞

This book has been translated into many languages.

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

一般將來時

的被動語態構成：will+ be + 及物動詞的過去分詞

A new hospital will be built in our city.

Many more trees will be planted next year.

含有情態動詞的被動語態構成：情態動詞+ be + 及物動詞的過去分詞

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.

現在進行時

的被動語態構成：am / is / are + being + 及物動詞的過去分詞

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.

不定式的

被動語態：to + be + 及物動詞的過去分詞

二、 怎樣把主動語態改成被動語態?

There are two books to be read. → 　　There are twenty more trees to be planted.

把主動語態改為被動語態非常簡單，可以遵循以下幾個步驟：

先找出謂語動詞;

再找出謂語動詞后的賓語;

把賓語用作被動語態中的主語;

注意人稱、時態和數的變化。

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.

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.

三、 使用被動語態應注意的幾個問題：

You must lock the door when you leave.→the door must be locked when you leave. 　　

不及物動詞無被動語態。

What will happen in 100 years.

The dinosaurs disappeared about 65 million years ago.

有些動詞用主動形式表示被動意義。

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