来自沈兵虎的问题
Isawtheywereplayingbasketballontheplayground.(改为简单句)Isaw__________basketballontheplayground.
Isawtheywereplayingbasketballontheplayground.(改为简单句)
Isaw__________basketballontheplayground.


Isawtheywereplayingbasketballontheplayground.(改为简单句)Isaw__________basketballontheplayground.
Isawtheywereplayingbasketballontheplayground.(改为简单句)
Isaw__________basketballontheplayground.
Isaw(them)playingbasketballontheplayground.
(seesb.doingsth.看见某人做某事)