你或我必须告诉他。

Either you or I must tell him.

youdao

帮助他首先，我必须告诉他玩电脑游戏太多对身体不好，特别是他的眼睛。

First, I must tell him that playing computer games too much is bad for his health, especially for his eyes. So he must give it up.

youdao

“在这里，”他对自己说，“我必须找到好心的仙女告诉我的奖品。”

"Here," said he to himself, "must I find the prize the good fairy told me of."

youdao