两种情况:1,如果是对话类型,现在问你有没有看见,你回答我没看见,答案就是I don't see it.举例:你看见桌上的书了吗?Do you see the book on the table? 我没看见。 No, I don't see it.2,如果是问你已经发生的事情,那就是I didn't see it.举例:你刚刚看见桌上有本书了吗?Did you see there's a book on the table? 我没看见。No, I didn't see it.希望能帮到你,有问题随时问。