I often saw you play basketball in the summer holiday.这里为什么用saw,不是和 often重复了吗?

I often saw you play basketball in the summer holiday.这里为什么用saw,不是和 often重复了吗? i often saw the children () football.A,play B,playedC,playingD,to play -I often play ping-pong.-Great!I can play ＿-I often play ping-pong.-Great!I can play ＿＿ you.A.atB.withC.and I often see them play foootball,and I saw them____football at 4 o'clock yesterday.A.play Bplayed Cplaying Dto play 选哪个,为什么,理由 Do you play football选择题Do you play football A Sometimes I do B Yes I ,often play C I often do 请解析以下两个句子：when I take a walk in the park, I often see many people (walking) dog中为何用walking?而 I often saw you (play) basketball during the summer holidays中为何用play? 我知道see sb do sth 和see sb doing sth 这 I often play the piano___ ___ ____(在周末) Do you often _____ _____（上网） I saw her play when I was Do you often play football? I saw you smiling I often play the piano. 2.I often saw you read in the library d_____ the summer holidays. you need to play with your dog more often ----yes,i play with it in the park()lunchtime onsundaysAwhenBtillCasDwhile How do you spend your weekends I often play ___the swing. 选择填空 （）1.--I often saw then ( ）on the playground last year A.play soccer B.playing选择填空（）1.--I often saw then ( ）on the playground last yearA.play soccer B.playing soccer C.to play soccer（）2.（）pollution is harmful t I often play play ping-pong with my friends.(改为一般疑问句）好快------ you often ------ping-pong with my friends? 1.--Where do you often play?--I often play ( ).2.--l have a map ( ) China.提示词：ofanditatsomedog.可用短语或单词 原文说I OFTEN PLAY WITH MY PET.后面又说It is a spider.问：What do you often play with 填MY PET还是A SPIDER啊?