人教版高中英语必修二第三单元Grammar
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GRAMMAR现在完成时的被动语态【例句呈现】仔细阅读下列句子,注意观察它们的不同点。
1. A great number of survivors have been rescued by the soldiers since the big earthquake.2. These topics have been talked about for a long time.3. The lost vase has not been found yet.4. Has his new novel been translated into French recently?5. The sports meeting of our school has been put off because of bad weather.6. —Why not go into the classroom?—The door has been locked.【归纳总结】1. 现在完成时的被动语态由“助动词have / has + been +过去分词”构成(句1~句6),has只用于第三人称单数(句3~句6);其否定式是在has / have后加not(句3);其疑问句形式是将has / have提前至句首(句4);2. 现在完成时的被动语态可用来表示过去开始的被动动作一直持续到现在,句中经常会有“since +具体时间”或“for +一段时间”等时间状语;现在完成时的被动语态还可用来表示被动的动作在过去发生或完成,但是对现在仍然有影响。
【辨析】现在完成时的被动语态与一般过去时的被动语态的区别:现在完成时的被动语态和一般过去时的被动语态均表示过去发生的被动动作,但现在完成时强调这一动作对现在有影响,而一般过去时则侧重于动作发生在过去,不强调对现在造成的影响。
如:The gymnasium of our school was built five years ago.A new gymnasium has been built in our school.【注意】1. 非延续性动词或短语用现在完成时的被动语态表示状态时,可与表示时间段的状语连用。
⼈教版选择性必修⼆SectionⅢGrammar——表语从句Section ⅢGrammar——表语从句⼀、定义[合作探究]This is where I don’t agree with you.(where引导表语从句,where在从句中作地点状语)这就是我不同意你的地⽅。
That is why he was late for class again.(why引导表语从句,why在从句中作原因状语)那就是他⼜⼀次上课迟到的原因。
My question is where we will travel and how we will get there.(where引导表语从句,where在从句中作地点状语;how引导表语从句,how在从句中作⽅式状语)我的问题是我们将去哪⼉旅⾏以及我们将如何到达那⾥。
[⾃主发现1]在主从复合句中充当表语的从句,其作⽤相当于⼀个名词。
表语从句放在系动词之后,即主语+系动词+表语。
⼆、⼏种表语从句1.that与what引导的表语从句[合作探究]The trouble is that I have lost his address.⿇烦是我把他的地址丢了。
That was what she did this morning on her way to school.那就是她今天早晨在去学校的路上做过的事。
[⾃主发现2]连接词that引导表语从句,不充当成分,⽆意义,但是不能省略;what是连接代词,引导表语从句时,在从句中作主语、宾语、表语或定语。
2.whether引导的表语从句[合作探究]The question is whether you can do the work well.问题是你能否做好这项⼯作。
[⾃主发现3]whether引导表语从句,不充当成分,意为“是否”。
此时⼀般不能与if互换。
3.why与because引导的表语从句[合作探究]The reason why he asked for two days’ leave is that he had to take care of his sick son.他请了两天假的原因是他要照顾他⽣病的⼉⼦。