我们车间使用的这种机器是中国制造的。 但是，如果从句和主句的动作在将来不同的时间发生，则两部分都要用来将来时
Such machines as are used in our workshop are made in china.
在时间状语从句和真实条件句中，通常用一般现在时表示将来时间。
I'll give it to you as soon as he comes back. I'll drop in if I have time.
过去将来时的时间表示的是过去的过去，常用于主句是过去时的宾语从句中。
He said that he was going to live in the country soon. He asked me if I was going to visit the patients tomorrow.
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