情态动词考察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

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情态动词考察Couldyouputmethroughto3362541?Oh,you____theexchange.You____thenumberdirect.A.needn''thavecalled

情态动词考察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
情态动词考察
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

情态动词考察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
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……

情态动词考察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 初中考察的情态动词有几个 情态动词是实词吗,比如Could you pass me the salt中的Could? 英语情态动词专练情态动词专练用could should couldn't shouldn't填空A:well ,look at your bedroom,jenny.you ___clean your room every day.you __leave all the things around.B:i don't know i ___keep them .i think you ___help me put them could you swim when you were eight years old 为什么这里的were不用原型,could不是情态动词吗? 情态动词should和could的用法 情态动词can和could区别 我想问一下could是不是情态动词? “Could you please tell me your name?这句话情态动“Could you please tell me your name?这句话情态动词为什么不用can而用过去式could? need情态动词的过去式是什么?need情态动词的过去式是什么如can是could Will you answer the phone?It could be your mother.怎么分析这个句子的成分?特别是could be情态动词后面+be是什么意思?He must be over sixty now.也是情态动词+be could咋区分是情态动词还是过去式 情态动词can could might may 的用法和区别 情态动词的用法,can,may,must,need,could,dared 情态动词could,might,may,can,等的用法 英语情态动词用法:may could……等等 could表示能,可能时是情态动词吗 情态动词与be动词的关系例如:You could be more friendly.在这个句子中could 和be分别是情态动词和be动词,我知道两者都是动词,动词是不能修饰动词的,为什么这个句子中还要出现,是跟系表结构有关