精选优质文档-倾情为你奉上Unit 3 A day out 知识点讲解1. You need to exercise and keep fit. exercise动词,“锻炼，训练”。例如：You dont exercise enough. 你锻炼得不够。Every day I exercise before I go to sleep. 我每天睡觉前锻炼。 拓展：A. exercise 可数名词，“练习，训练，体操”。例如：We have five math exercises to do today. 我们今天有五道数学练习题要做。We will have a field exercise tomorrow. 明天我们将要进行一场野外训练。My parents often do morning exercises in winter. 我父母经常在冬天做早操。B. exercise 不可数名词，“锻炼；运动”。例如：Exercise makes us strong and healthy. 锻炼使我们强壮健康。一句话：
