高校问答钱锟韩网评价:请问：On doing...（一怎么样，就怎么样）属于什么语法现象
来源：百度文库 编辑：高校问答 时间：2024/04/30 04:14:42
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On doing意思是当...时候，或一...就，相当于“when...”“as soon as”。
On seeing the teacher coming into the classroom, all students stood up.相当于When the students saw the teacher come into the classroom, they all stood up.或As soon as the students saw the teacher come into the classroom, they all stood up.
On doing ...(doing只能是短暂性动词），此结构是介词短语，即介词＋动名词构成，相当于when或as soon as引导的时间状语从句．