后跟名词例如:at school在上学,in person亲自,on duty值班,at work在上班,by hand用手,with pleasure乐意等。后跟代词:I'm on it.我来办。stand by him站在他身边few of them他们中的少数几个part of it其中一部分depend on you指望你后跟动名词:do well in dancing擅长跳舞be good at swimming擅长游泳how about going traveling去旅行怎么样be fond of cycling酷爱骑行