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.

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

but ever since he moved in,he has had trouble with cars.前面一句为什么不用完成时.
表示自从那个动作以后
只是表述那个时间点,而不是从那个点到现在这段时间