8 teaches 9 take 10 is 11 likes 12 have 13 looks 14 do 15 am 16 goes 17 does 18 watch 19 have 20 is 现在完成时,单三人称单三形式(have变has;do变does),其他用原型 there be句型可数名词用are,不可数名词和可数名词 单数用is.
追答
不好意思那个The child often watches Tv 是对的 我看错了,child是单数,后面也应该是相对应的watches 不好意思。