Unit 1 How often do you exercise?
重点语法：频率副词
询问别人做某事的频繁程度
提问用 How often 引导特殊疑问句
回答用 always,sometimes,twice a day 等频率副词.
例句：A:How often do you watch TV?(你多长时间看一次电视?)
B:I watch TV every day.(我每天都看电视.)
A:What's your favorite program?(你最喜欢的节目是什么?)
B:It's Animal World.(是《动物世界》.)
A:How often do you watch it?(你多长时间看一次这个节目?)
希望能帮到你啊!