高二英語選修七Unit2 Robots導學案
they make her clean the floor. she is made to clean the floor by them.
3. it + be + 過去分詞 + that從句 (=主語+ be + 過去分詞 + to do sth.)
表示：據說/據報道/據悉/據信等……
it is said that the boy has passed the national exam.
the boy is said to have passed the national exam.
4.動詞get代替be。(get往往用在口語中。)
there was a fight at the pub, but fortunately nobody got (=was) hurt.
get + done 同 be + done 的區別：
get done 往往表示行為不是計劃之中，而是意外發生的。如：
the dog got run over by a car.
不可以變成被動語態
1. 某些感官動詞加形容詞及少數其他的動詞可以表示被動意義。
cook, smell, taste, wash, write, shut, prove, sell, read, write
. the dish tastes delicious.
the theory proved right at last.
. the book is so interesting that it sells well.
“sells”此處為不及物動詞“銷售起來; 有銷路”的意思；作及物動詞為“賣; 出售”
this kind of cloth washes well. (耐洗)
2.need + v- ing 表示“主語承受動詞發出的動作”，表示被動意義。
我的車需要修理。my car needs repairing (= to be repaired).
3. 某些表示狀態或者特征的及物動詞沒有被動語態形式。這類動詞常見的有：
beg, equal, fail, hold, possess, fit，become, contain, cost, have, lack, resemble (相似), suit等。
this new english-chinese dictionary cost me ten dollars.
4. 通常只有及物動詞（組）才有被動語態，不及物動詞沒有。
如：戰爭爆發了。
可以說：the war broke out. 但不能說：the war was broke out.
被動結構與系表結構的區別
“be + 過去分詞”這個結構并不都是被動語態，也可能是系表結構。被動語態與系表結構主要區別是：被動結構表示一個動作，而系表結構表示主語的特點或所處的狀態，試比較下面的句子：
被動結構 the enemy was soon surrounded by us.
系表結構 the house is surrounded by trees.
被動結構 she was bitten by the dog in the darkness.
系表結構 i was excited by the news that my husband got promoted.
課堂檢測
1.old mcdonald gave up smoking for a while, but soon _____ to his old ways.
a. returned b. returns c. was returning d. had returned
2.in some parts of the world, tea _____ with milk and sugar.
a. is serving b. is served c. serves d. served
3. the new dictionaries are very useful. they ____ well and ______ already.
a. sell, have been sold out b. sold, had sold out
c. sell, sell out d. are sold, have been sold out