watch!I am watching but I do not see anything unusual为什么是do not ,而不是did not?

I am watching TV now.(watch TV 划线)划线提问 I am interested in ______ TvA:watch B:watching Don not talk.I am busy______TV.A.to watch B.watch C.watches D.watching ( )7.I with my sister _______ TV.A.are watch B.are watching C.am watching D.is watching i am not like watching tv.I only watch tv on saturday evening(改错) while my mother was cooking ,i ___ TV.A.was watching B.am watching C.watch D.watched I ______a movie this Sunday.A.watch B.watches C.watching D.am watching拜托各位了 3Q i ( )a football match last night.A,watch B,watches C,watched D,am watching I WATCHING TV对吗I AM WATCHING TV 和I WATCH TV不是说I后面动词要直接用,不用BE动词了.如I GET..而这里WATCH是动词为什么要说I AM WATCHING?为什么不说 I WATCHIN TV?为什么I WATCH TV不说成 I AM WATCH TV.. I watch TV.和 I am watch TV.用法有什么不同打错了，第二句是I am watching TV I am watching TV at home 改同义句 I ____ ____ ____ watch DVDs at home. watch!I am watching but I do not see anything unusual为什么是do not ,而不是did not? be动词能和动词连用吗比如：i was received...和i received...哪个才是正确的啊?i am watching tv 和i watch tv I usually spend my weekend watching television,在这句中watching,为什么不用watch,而用watching I am watching TV.改成一般疑问句 I am watching TV about football是什么意思? watching am TV i .连词成句 是I like watch TV,还是I like watching TV