-These farmers have been to the United States.

-Really?When ________ there?

[  ]

A.

will they go

B.

did they go

C.

do they go

D.

have they gone

答案:B
解析:

  現(xiàn)在完成時(shí)與一般過(guò)去時(shí)容易混淆,就是因?yàn)樗鼈兯硎镜膭?dòng)作都發(fā)生在過(guò)去,但二者又有區(qū)別:一般過(guò)去時(shí)表示過(guò)去某個(gè)時(shí)間發(fā)生的事、存在的狀態(tài)或經(jīng)常發(fā)生的動(dòng)作,說(shuō)話的側(cè)重點(diǎn)在于陳述一件過(guò)去的事情,與現(xiàn)在沒(méi)有關(guān)系;現(xiàn)在完成時(shí)表示與現(xiàn)在有關(guān)系的、發(fā)生在過(guò)去的動(dòng)作,它不與表示過(guò)去的時(shí)間狀語(yǔ)(如yesterday,last week,a moment ago等)連用。故答案為B。


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