Unit 5 Topic1重点语法一般现在时（常与频度副词never, seldom, sometimes, often,usually, always等连用）重点句型 How do you usually come to school? I usually come to school by subway. How often do you go to the library? Once/Twice/Three times a week/Very often/Every day/Sedom重点详解1I always come to school by bus. by+交通工具名称，表示使用某种交通方式，中间不加限定词，如果交通工具前有a, the, my 等限定词，就不能用by,而是用in或是on. on the train=by train on his bike=by bike in my car=by car. 巧辩异同on foot 与 walk on foot “走
