had been warned与have warned有什么区别

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• 1.She ____into the thick forest alone on such a dark night.A.dares not go B.dares not to go C.dare not to go D.doesn`t dare to go2.If he ____,he ____that food.--Luckily he was sent to the hospital immediateiy.A.was wared;would not take B.had been warned ;would not have takenC.would be warned;had not taken D.would hae been warened;had not taken 3.He ___you more help,een thougu he was very busy.A,might have gien B.must have done C.might have given D.mus
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• had been warned与have warned有什么区别
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• to be + 形容词 与直接用 形容词 有什么区别?The teacher asked the students to be quiet.Modern telecommunications have had a dramatic impact on our mobility similar to the invention of the automobile or the train.与汽车或者火车这两项发明一样,现代通信对我们的流动性产生了极大影响. to be quiet 和 直接用similar 好像都是对的?为什么这里不是 being similar 或者 to be similar
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• had+done 与have+done有什么区别?举例
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