过去进行,现在进行有啥区别He is doing his homework while his father is wa
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英语的逻辑性比较强,现在进行时表示此时此刻正在进行的动作,动用于日常对话,比如" I'm watching TV ",过去进行时用于描述过去某个时间进行的动作,比如" They were playing football at this time yestoday ".