in vain __________ to persuade her to give up her wrong opin

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in vain __________ to persuade her to give up her wrong opinion and cooperate with us
A.we tried B.we had tried C.did we try D.had we tried 为什么?

in vain 表示否定意思,放在句首要部分倒装,就是说把助动词（或情态动词）提到主语前面,原句应该是一般过去时,所以用did放在we前面,后面动词原形,类似的还有no,seldom,hardly等这些表示否定的词放句首也部分倒装

in vain __________ to persuade her to give up her wrong opin There is no need ___(persuade) her to give up her job. he tried in vain to comfort her.I could see worry etched on I tried to persuade him not to keep in touch with her,but wh there is no use in trying to persuade him in her home.语法有误吗? 英语We tried to p__ her to give up her foolish plan,but faile Be in love with her to is wrong?是什么意思为什么give it to her 中用her i persuade her to go to school 的否定句是i persuade her not to 还是 please give they to her 1.A women used to give up her job so that she could___ her h she doesn't get on with her boss so she wants to give up her