I saw them playing football on the playground just now 为什么只能填playing

I saw them playing football on the playground just now 为什么只能填playing I saw them playing football in the playground 这里的 playing football 是动名词短语吗 同义句转换：When I passed by,I saw them playing football.（改passed by) I saw ( ) playing in the street at that timeA them B they C their D theirs I saw them ( )volleyball this time yesterday.A.play B.played C.to play D.playing I saw them playing football in the playground 可不可以说 in the playground 是地点状语修饰playing吖 I saw them playing football in the playground 这里的宾语补足语是 playing football还是 playing football in the playground 吖 when____by,I saw them playing basketball on the playground这里的横线上应该填passing还是passed I saw them _ basketball at nine o' clock in the morningA.playing B.playd C.to piay D.play I saw them【 playing football in the playground】因为这里的地点状语是修饰宾语补足语的 而不是 saw我的对吗 I saw them playing football in the playground这里的地点状语是不是修饰playing吖 就是说它修饰宾语补足语咯.那它还是状语吗 I saw the boys playing football happily同义句I saw ( ) ( ) ( ) ( ) playing football happily I saw them( )basketball when I walked past the playground just now A were playing B piayingC cheaper,much D cheap,more(解析 I saw them playing football in the playground这里的地点状语是不是修饰playing吖He likes running【 in the park】状语是不是这个状语修饰running吖 I saw him yesterday afternoonA playing soccerB play soccer I saw that he was playing football同义句 saw them【 playing football]宾语补足语【 in the playground】地点状语修饰宾语补足语playing i heard the bees long before i saw them