UC知道情态动词考察
来源：百度知道 编辑：UC知道 时间：2024/07/04 02:07:17
Could you put me through to 3362541?
Oh,you ____ the exchange.You ____the number direct.
A. needn't have called;could have dialed B.didn't have to call;could dial C. needn't call ;would dial D.don't have to;would have dialed
这题为什么选A?B不可以麽？ 还有其他两个选项也说下
Oh,you ____ the exchange.You ____the number direct.
A. needn't have called;could have dialed B.didn't have to call;could dial C. needn't call ;would dial D.don't have to;would have dialed
这题为什么选A?B不可以麽？ 还有其他两个选项也说下
此句意思为：
A.你没必要拨交换机（事实上你已经拨了）。你本来可以直接拨号码（但你没有这样做）。这句有点虚拟语气的意思。
B.过去没必要拨（没拨），过去可以拨（没拨）。didn't have to=needn't
C.与B相同，过去将会拨
D.现在不必拨(少了call这个单词)，将会已经拨了
couldn't/could have
needn't/need have
都是情态动词完成时，表示本不能/能（不必/必）做的事做了（没做），其它选项都没有完成时……