l saw a little boy fall into the water.为什么不用fell,而用fall?为什么不
l saw a little boy fall into the water.为什么不用fell,而用fall?为什么不
l saw a little boy fall into the water.是用fall还是falling?
I saw a boy fall off a bike,这句话saw用了过去式,为什么fall不用?
i saw a boy ()into the river.用fall还是falling?
Little Water Drop and some of his friends fall down into a l
Little water Drop fall down into a lake改错
fall和fall down有什么区别?为什么有的时候说water fall from the clouds
I saw a boy fall off the bike and hurt himself.还是I saw a boy
after a heavy rain,the wall (fell down)为什么不是fall down?
pour a Little water into the bottle 中的pour 为什么不加ing
fall into是不是介词?into呢?为什么?
i saw her fall into