l 习惯用法中:at night在晚上，at work在上班，at home在家，in danger在危险中，go to school上学，go to the school去学校，lose weight减肥，ask for advice，keep in touch with，in fact事实上，at dinner在吃饭，in trouble处于困境，after school放学后，on fire着火，by hand手工，by bus/car/taxi/water/plane/train乘坐公交/汽车/出租车/船/飞机/火车，watch TV看电视，come back to life苏醒，have sports进行运动，pay attention to注意，take care of照顾，take part in参加。
