This machine needs______once a year in order to work properly求大神帮助A.to check B.checking C.checkD.checked 正确答案是选B,我知道B是被动语态,而且 表示已经做过了.而A和D为什么不行,
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![This machine needs______once a year in order to work properly求大神帮助A.to check B.checking C.checkD.checked 正确答案是选B,我知道B是被动语态,而且 表示已经做过了.而A和D为什么不行,](/uploads/image/z/9030422-38-2.jpg?t=This+machine+needs______once+a+year+in+order+to+work+properly%E6%B1%82%E5%A4%A7%E7%A5%9E%E5%B8%AE%E5%8A%A9A.to+check+B.checking+C.checkD.checked+%E6%AD%A3%E7%A1%AE%E7%AD%94%E6%A1%88%E6%98%AF%E9%80%89B%2C%E6%88%91%E7%9F%A5%E9%81%93B%E6%98%AF%E8%A2%AB%E5%8A%A8%E8%AF%AD%E6%80%81%2C%E8%80%8C%E4%B8%94+%E8%A1%A8%E7%A4%BA%E5%B7%B2%E7%BB%8F%E5%81%9A%E8%BF%87%E4%BA%86.%E8%80%8CA%E5%92%8CD%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E8%A1%8C%2C)
This machine needs______once a year in order to work properly求大神帮助A.to check B.checking C.checkD.checked 正确答案是选B,我知道B是被动语态,而且 表示已经做过了.而A和D为什么不行,
This machine needs______once a year in order to work properly求大神帮助
A.to check B.checking C.checkD.checked 正确答案是选B,我知道B是被动语态,而且 表示已经做过了.而A和D为什么不行,
This machine needs______once a year in order to work properly求大神帮助A.to check B.checking C.checkD.checked 正确答案是选B,我知道B是被动语态,而且 表示已经做过了.而A和D为什么不行,
need 只有这两种用法,need doing,need to be done
This machine is unavailable.
This kind of machine can p_______ music.
This machine is very easy to
This machine is very easy to
the machine has been recovered this
Machine
Machine
Machine
This is a very expensive machine同义句转换This is( ) ( ) ( )machine
He ordered a washing machine by phone yesterday,and _____ machine will arrive this afternoon.
Come and see this machine,Pat and koko. 解释
补充This kind of machine can p___ muice
Come and see this machine,Pat and Koko.
This machine is used for-----(cut) things into pieces
this factory produces machine tools改为被动语态
This machine is ______(easy to undrestand) to ues.
who designed this kind of machine?改为被动语态 help~
This machine,______for many years,is still working perfectly.