Some boys were seen ————(play)football on the playground yesterday

Some boys were seen ————(play)football on the playground yesterday 更正下面句子的错误,每题仅有一处错误 The police were told that some boys were seen play on thestreet The missing boys were last seen _____ near the river.为什么填playing “ing”形式? Where are the boys?They _basketball over there just now.A were seen play B were seen to play请给出原因 The missing boys were last seen playing near the river这里为什么用missing 和playing The missing boys were last seen playing near the river这里为什么用missing 和playing 而不用misse和play? Were were the boys( )那时 Some boys were talking and laughing ___(noise)when the teacher came in We found some boys in the room.They were playing chess.(合并为一个句子） some children were seen flying kites in the sky 怎样翻译 Some were playing games ander a big tree.Some were singing and dancing.Some boys and girls were runSome were playing games ander a big tree.Some were singing and dancing.Some boys and girls were running up the hill.Others were drawing pictures. the missing boys were last seen ____near the river A.playing B.play C.played D.to play但是see的被动语态不是 see sb to do .. The boys were seen ___model ships in the room when someone rang the bell.我觉得填to make 也对啊 为什么非要用making呢 the missing boys were last seen 空格 near the river; a:playing ; b:to be playing,我这儿的答案是b, The ____ boys were last seen ______ near the West Lake.A.missing ; play B.missed; played C.missed ; to play D.missing; playing we found some boys.they were playing chess.合并为一句合并为一句we () some boys ()()这是运用了什么结构,还有,题干中为什么是were playing,这是什么时态?不是一般过去时直接played么 改为否定句和疑问句.1.I found an interesting book.2.There were some boys in the room. the police were told that some boys were seen_ on the streetA to play B.playing C.to be playing D played. Boys,please help__________to some fish.