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Pages: 28-29
Year: Issue:  Z2
Journal: Required Reading for Junior Middle School Students

Keyword:  委婉语终止性动词延续性动词否定式状语从句主句谓语动词否定形式中动词反意疑问句;
Abstract: <正>问:"He listened to the radio until his father came back."和"He didn’t listen to the radio until his father came back."的意思有何区别?(滁州如涛)答:在till或until引导的时间状语从句中,如果主句的谓语动词是终止性动词,则主句只能用否定式。如:Mr.Smith didn’t marry until he was fortyfive.我们不能说:Mr.Smith married until he was forty-five.如果主句中动词是延续性动词,那么主句用肯定或否定形式都可
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