----their homework , the children went for a walk .

学习时间:2026-03-30 15:49:03 阅读：8945

____their homework , the children went for a walk .a.when they were doing b.after they have done c.Having done d .They had done请选择帮忙解释一下

英俊的芝麻

2026-03-30 15:49:03

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c第一,现在完成时表示作完作业的动作在出去散步的动作之前,而出散步用的是过去时,做作业当然用现在完成时。第二,主语是the children,前面的做作业的动作由主语完成,表示主动,所以用主动语态,因此,用hanving表示主动语态,另外,having也表示引导一个现在分词短语。