but ever since he moved in,he has had trouble with cars.前面一句为什么不用完成时.

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• but ever since he moved in,he has had trouble with cars.前面一句为什么不用完成时.
• over the past year一定用现在完成时吗?以前讲现在完成时时,老师说有over the past year就用现在完成时但是现在课本上有这样一句话：He was charged with breaking into several computer systems over the last year.为什么前面是“He was”而不是“He had been”或“He has been”?（句中所说的he已被谋杀）
• 高三过去完成时和一般过去式的区别1.-peter,where did you guys go for the summer vacation -we had been busy with our work for months so we went to relax ourselves .had been busy 既然下边两个可以用过去时 这个为什么不用 2.I dont drink now,but I ever drank for almost ten years ,drank 为什么不用had drunk 3.have you known Ted for a longtime?-yes,since he came to the village.came 为什么不用过去完成时?
• 拘束,幼稚,清晰,拒绝的近义词和反义词
• he has had trouble with cars and their owners.这句话中with是什么意思,什么用法