after a heavy rain,the wall (fell down)为什么不是fall down?

after a heavy rain,the wall (fell down)为什么不是fall down? After ___ for a while,the whole building fell down Rain Fall Down 歌词 fall down into the 是The building is fell down还是The building fell down?为什么? fell down He fell down dead.为什么dead 可以修饰fell down? the wall of the house fell down,_____some pigs behind it.填in He tried to skate,but he ___ A.fall down B.fell over C.falle fall down The bottle_____the table and broke A：fell down f A stone hit ( ) and he fell down on the ground.