Unit 2 How often do you exercise?Section A1、 由how构成的疑问词：英语短语中文意思例句how often多久一次询问动作的频率How often do you watch TV?你多久看一次电视？how long多久，询问时间多久How long does it take you from your home to school?你从家到学校需要花费多长时间？how soon多快，过多久询问时间多快How soon will he come back.他要多久回来？how far多远，询问距离多远How far is it from your home to school?从你家到学校有多远？how mucha) 多少，询问不可数名词数量+不可数名词，b) 多少钱，询问价格（单复数由后面的主语确定）How much milk is there in the glass?玻璃杯里有多少牛奶？How much are thes
