英语时态的运用I saw a girl throw herself on him 这里saw是用了see的过去式那为什么

英语时态的运用I saw a girl throw herself on him 这里saw是用了see的过去式那为什么 英语倒装句的问题I saw him only yesterday.Only I saw him yesterday.这里 saw 是不是see 的过去式 On the train I saw a girl whom I thought was your sister.这里用 I saw he coming in .see为什么用过去式啊 I saw a saw saw a saw的中文意思 see的过去式saw的音标是什么 I saw a boy fall off a bike,这句话saw用了过去式,为什么fall不用? see的过去式saw怎么读? 英语里过去式和过去分词的区别是什么啊?比如see~seen~saw谢谢了, 英语简单语法.I saw him heading for the river just now.这里为什么用him?什么 seen是see的过去分词,那saw是?