题目
when前后时态
when 后面可以加进行时
when 后面可以加进行时
提问时间：2021-01-15
答案
when 后面可以跟 一般现在时,一般过去时.
例如：
He was doing his homework when his father came back.
He will write to you when he arrives in Beijing.
例如：
He was doing his homework when his father came back.
He will write to you when he arrives in Beijing.
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