i enjoy watching them jump around.they is always jumping around.请问同样的意思表达,为什么第一句中用jump around,而第二句却用了jumping around?第一句中的jump是什么词性,第二句呢?

I enjoy teaching 和 I enjoy watching TV I enjoy watching TV.(一般疑问句) I enjoy watching movies的同义句 I enjoy ____ the short and interesting articles in the magazine.A.watching B.seeing C.reading As well as 'going' to the movies,i also enjoy 'watching' football games.中的‘go' 'watch'为什么...As well as 'going' to the movies,i also enjoy 'watching' football games.中的‘go' 'watch'为什么要用ing形式? We enjoy watching movies about _____ (live) in the future. Many people enjoy watching the _____(日落)in autumn I think they will enjoy it after watching the TV programme,_______?A.don't I B.don't they C.won't they D.won't I I enjoy the concert a------------. enjoy的正在进行时用法enjoy也是加ing的吗．．?what are you doing?I'm watching TV.Could you help me a hand?sure.I'm_____.The TV _____ is boring. I like watching the dolphin__in the water. I‘m reading a book in the bedroom while some friends are watching TV in the living room（改为同义句）My friends and I enjoy ourselves in the house ____ ____ ____ ____ . I pref watching TV to reading the I like watching the swimming r__on TV I like watching the m____ at night. I （ ） watching English TV programs. A. enjoy B.want C.put D.walk I ( ) watching English TV programs. A.enjoy B.want c.put D.walk/ I enjoy the concert a ____