这节课我们将学习两个新的动词:Exercise(练习、训练)和Sing(唱歌)。先来看一下Sing在肯定句、否定句以及疑问句中的用法:I sing very well.(我唱歌唱得很好)I don’t sing very well.(我唱歌唱得不好)Do you sing very well?(你唱歌唱得很好吗)再来看看Exercise在肯定句、否定句以及疑问句中得用法:You exercise in the morning.(你在早晨锻炼)You don’t exercise in the morning.(你不在早晨锻炼)Do you exercise in the morning?(你在早晨锻炼吗)