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模块四 Module IV Modern life《Grammar and usage(1)： The passive voice；Modal verbs and the passive voice》最新PPT课件优质课下载
The lovely robots attracts the visitors.
The visitors are attracted by the lovely robots.
S.
V.
O.
O.
V.
S.
The Great Wall was visited by many people last year.
S.
V.
O.
O.
V.
S.
Many people visited the Great Wall last year.
被动语态的基本形式是 be + 过去分词。通过改变be的时态，可以构成不同时态的被动语态。
e.g. Food is kept in the fridge.
The glass was broken by the boy.
The passive voice in different tenses:
The present perfect
The present continuous
The simple present
The passive voice
The active voice