摘要:3.How often do you exercise?你多长时间进行一次体育锻炼? How often询问做某事的频率.回答可以是具体的间隔时间.也可以是表示频率的副词.如: How often do you eat fruit and vegetables? I eat fruit and vegetables every day. How often do you walk to school? I never walk to school. How long询问做某事持续的时间.答语中的时间常用介词for 引出.如: How long do you watch TV every night? I watch TV for 2-4 hours every night.

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