He didn't finish his homework yesterday afternoon.他昨天下午没有完成作业.(didn't 后必须动词原形）
He hadn't finished his homework until yesterday afternoon.这样的意思就是：他直到昨天下午才完成作业.（这样成了原句的近义句了）
He finished his homework yesterday afternoon （改为否定句）
He finished his homework yesterday afternoon （改为否定句）
英语人气：553 ℃时间：2020-02-02 18:48:37
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