作业帮I ___you have bought a new car.A.heard B.hear为什么选B项不选A项?请详解书上有例句:I heard that he was ill.I heare him say so正听见时是:I can hear someone knocking
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I ___you have bought a new car.A.heard B.hear为什么选B项不选A项?请详解书上有例句:I heard that he was ill.I heare him say so正听见时是:I can hear someone knocking
I ___you have bought a new car.
A.heard B.hear
为什么选B项不选A项?请详解
书上有例句:I heard that he was ill.
I heare him say so
正听见时是:I can hear someone knocking
I ___you have bought a new car.A.heard B.hear为什么选B项不选A项?请详解书上有例句:I heard that he was ill.I heare him say so正听见时是:I can hear someone knocking
如果选A,have就要变成had.因为一个句子的时态应该是一致的,完成时表示的是这个动作发生前已经完成了的动作,如果按照这个先后顺序,就是买车在前,听说在后.所以,买车用的是现在完成时,听说就要用现在时,而不是颠倒顺序的过去时.
肯定了."我曾听说"和"我听说"能一样么?
因为后面的从句“you have bought a new car.”用的是现在完成时，所以主句不用过去式。[若主句的动词为过去式，则从句要用相应的过去形式]
之所以不选择A项是因为从句用的是现在完成时,所以主句是以"现在"作为时间点的,用hear;
如果用heard的话,从句发生的动作(即购买新车)是在听到(heard)之前就完成的,就要用过去完成时,即I heard you had bought a new car.
默文英语
heard是过去时，have bought是现在完成时
如果用heard的话就是我（过去）听说你（现在）have bought a new car，不通啊，呵呵...
heard是过去式，听说这个动作已经是发生了，当然用heard
I___you have bought a new car.
填hear是因为you后面是have bought(现在完成时)；
如果填heard的话you后面必须是had bought,因为买车是在听说之前，所以过去的过去就该用过去完成时。