First of all I must warn you!

首先我要警告你们！

youdao

But I must warn you.

但是我必须警告你。

youdao

I must warn you beforehand that I shall tell them everything.

我必须事先向你说明，我会把一切都告诉他们。

youdao

I must warn you against that man.

我得提醒你防着点那个男人。

youdao

I must warn Shifu.

我必须去警告师傅！

youdao

I must warn you against raising your hopes.

我必须警告你不要期望过高。

youdao

I must warn you that my patience is almost at an end.

我必须警告你，我几乎是忍无可忍了。

youdao

I would love to help you, dear, but I must warn you: I will not lie.

我愿意帮助你，但是我必须告诉你：我不会撒谎的。

youdao

I would love to help you, dear, but I must warn you: I will not lie.

我愿意帮助你，但是我必须告诉你：我不会撒谎的。

youdao