如果我见到他，我会把这本小说给他。

If I meet him, I will give the novel to him.

youdao

如果我见到他，我肯定会告诉他的，但我已经好几天没见到他了。

I would certainly tell him if I saw him, but I haven't seen him around for quite a few days.

youdao

如果我见到他我将告诉他这个消息。

I will tell him the news if I see him.

youdao

And he said, "Because if I see you unhappy, " I'll tell them."

他说“因为如果我见到你不快乐，我会告诉他们“

哈佛公开课 - 幸福课课程节选