I saw her cross the road

I saw her cross the road I saw her to cross the road.这句子有毛病吗? I saw an old man___(to cross;crossing) the road i saw a man be about to cross the road.这话对么? i saw her____(cross) the road 这里不能填过去式crossed吗?请问为什么呢? When I looked out of the window I saw her crossing the road. cross the road等于? I often h___ old people cross the road Mary,don't cross the road Mary,_____ _____ the road.Now he i cross the road中文是什么? Cross the road啥意思 Don't cross the road.