2017年湖南省茶陵县高中英语 Unit 3 Tomorrow’s World Grammar and usage课件 牛津译林版必修4.ppt

2017年湖南省茶陵县高中英语 Unit 3 Tomorrow’s World Grammar and usage课件 牛津译林版必修4.pptUnit 3
Unit 3
Tomorrow’s world
The passive voice & Modal verbs and the passive voice & Verbs often used in the passive voice
Grammar and usage
句子的主动语态和被动语态在意义上区别很小。在主动语态中,句子的主语是动作发出者;在被动语态中,句子的主语是动作的接受者或受影响者。
The passive voice
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。
. Food is kept in the fridge.
The glass was broken by the boy.
The passive voice in different tenses:
Tense
The active voice
The passive voice
The simple present
The present continuous
The present perfect
do/does
are/is done
am/is/are doing
has/have done
am/is/are being done
have/has been done