📚 Day20 知识讲解

被动语态是由“助动词be+及物动词的过去分词”构成的。
be 动词本身无词义,但有时态、人称和数的变化。
用法
1.强调动作的承受者时 Mr. Green is respected by all of us.
2.不必指出或不知动作的执行者时 Printing was introduced into Europe from China.
3.动作的执行者是无生命的事物时 I was deeply impressed by the Great Wall.
结构(以动词do 为例,过去分词为done)
一般现在时的被动语态 am/ is/ are + done Chinese is spoken by many people.
一般过去时的被动语态 was/ were + done The cup was broken by the boy,
一般将来时的被动语态 will be done A new library will be built next year.
am/ is/ are going to be + done
现在进行时的被动语态 am/ is/ are + being + done The problem is being discussed now.
现在完成时的被动语态 have/ has been done All the work has been finished by now.
含情态动词的被动语态 情态动词+ be + done Teenagersshouldbeallowedtochoose
their own clothes.
 
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