关于语态的提问1.Our room must__cleanB.was founded D.was found这题用被动还

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关于语态的提问
1.Our room must__clean
B.was founded D.was found
这题用被动还是主动?为什么选B?
2.The workers__ten hours a day.
A.made work B.were made to work
这里为什么不选A?不是用主动语态吗?
3.His father___to work in Hong Kong 3 years ago.
这里为什么不能填has been sent?
4.Peter has to work till nine o'clock_____?
A.hasn't he B.doesn't he
为什么选B,真搞不懂

第一个题两个都不对哦应该是be found A你可以去查查found是建立的意思哦
第二题B,工人被迫工作,而不是工人主动去干10个小时!
第三题,三年以前是过去时态的标志性词语哦,所以不能用你说的这个,你说的这个事完成时
第四题,has做实义动词,不是完成时态,因为has后面没有跟动词!

关于found的被动语态 The PRC was founded on October 1st,1949.was founded是被动语态吧,可f the PRC was founded in 1949这句话是被动语态吗?是过去式时态吗? 被动语态中如Room was cleaned by me中句子成分是怎样的?这句话本来是主谓宾结构的怎么变为被动语态 The PRC was founded in 1949.变主动语态. He was cleaning the class room at that time （改为被动语态） 1.He was fired.是被动语态吗? the pair of shoes ( ) worn out?A.was found B.was founded why The company was found in 1997 The company was founded in 199 英语被动语态的结构he was killedthe window was broken by Mike都是表示被动语态被被动语态的特殊疑问句Who was the book ___?A.write B.wrote C.written D.w “I was born...”是不是被动语态