介词的主要分类:
1. at the cinema, in the hospital __________ 2. Write with a pen, go by bus ___________ 3. in summer, on September 1st ___________ 4. laugh for joy, be angry at his words________ 5. by the way, at last, in the end _________
地点介词
方式介词
时间介词
固定搭配
原因介词
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