一道初四英语选择题Tom wanted to know__________ shanghai to see the World EXpo.A.if they have gone toB.if had they been toC.if they had gone toD.if have they been to

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一道初四英语选择题
Tom wanted to know__________ shanghai to see the World EXpo.
A.if they have gone to
B.if had they been to
C.if they had gone to
D.if have they been to

C
宾语从句的语序是陈述句语序,排除B与D,另外主句是一般过去时,从句应用相应的过去时,再排除A

A

A
宾语从句用陈述语气

c是正确的

选C 首先know 后面接的是宾语从句，所以应用陈述语序；再考虑语态，谓语为wanted 所以应用过去完成时

c

A

C

C
宾语从句用正常语序
他们去了上海没回来是过去的事，应该用过去完成时

c 人在美国 不解释.

A

C 从句用陈述语序，时态为过去完成时！

C.know后面接的是宾语从句，宾语从句用陈述语序；另外谓语wanted是过去式，而have gone to的思是在去的路上或回来的路上，或者到达目的地，很显然这个去的动作发生在谓语wanted之前，所以，宾语从句要用过去完成时，即选C

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