1、Unit2.How often do you exercise?用法短语人教版八年级上册英语思维导图句型help with housework 帮助做家务活go shopping 去购物on weekends 在周末how often 多久一次hardly ever 几乎不once a week 每周一次twice a month 每月二次every day 每天stay up late 熬夜play sports 锻炼身体not.at all 根本不the most popular 最流行的such as 例如1.I go to the movies maybe once a month.我
2、可能一个月看一次电影。2.How often does he watch TV?他多久看电视一次？He hardly ever watches TV.他几乎不看电视。3.Do you go shopping?你购物吗？No,I never go shopping.不，我从来就不购物。4.Here are the results.下面就是结果。5.We found that only fifteen percent of our students exercise every day.我们发现仅仅百分之十五的学生每天锻炼。频率副词“次数”的表达方法how often“多久一次”问频率，回答常含有
3、频率词组或短语。go to the dentist 去看牙医more than 超过/多于Old habits die hard.旧习惯难改hard=difficult 困难的less than 少于/不到play tennis 打网球be free 有空go camping 去野营6.Its healthy for the mind and the body.对思想和身体都很健康。7.So start exercising before its too late!开始锻炼，为时不晚。always,usually,often,sometimes,never等频率副词在句中通常放在实义动词之前,
4、be动词或助动词之后。常用于一般现在时态中。一次 once，两次twice，三次或三次以上：基数词+times,如：three times,five times,常见的how疑问词：1）How soon 多久（以后）How soon will he be back?他多久能回来？He will be back in a month.他一个月后能回来。常见的how疑问词：2）how long“多久”How long did it take you to clean the house?你打扫房子用了多久？It took me half an hour to clean the house.我打扫这房子用了半小时。常见的how疑问词：3）How many+名复 How much+不可数名词 “多少”问数量 （how much 还可问价格）
