英语问题！！

Question

I saw Tom often swims with his father during the summer holidas.
I saw Tom often swam with his father during the summer holidas.
I saw Tom often swim with his father during the summer holidas.
I saw Tom often swimming with his father during the summer holidas.
哪个是对的？？
为什么？

Answer 1

I saw Tom often swam with his father during the summer holidas.
正确， saw 接宾语从句

I saw Tom often swim with his father during the summer holidas.
正确， saw 接无to 不定式做宾补

I saw Tom often swimming with his father during the summer holidas
正确， saw 接现在分词短语做宾补

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可是只选一种啊？

追答

可是这三个都是对的

Answer 2

D 看见某人在做某事 在游泳是进行时态追问

是过去式啊

追答

游泳那动作是进行时

Answer 3

问题英文