If you cannot go yourself, try to find someone to substitute you.

如果你不能亲自去，试着找人代替你。

youdao

If you cannot go, let him go instead.

如果你不能去，让他替你去。

youdao

You are not well enough; — you cannot go yourself.

你身体不好；你不能去。

youdao

and you cannot go out in public,

而你不愿意在公共场合露面，

I feel like 课堂 - SpeakingMax英语口语达人

There's only one occasion where it helps to go to three dimensions because there are certain things you can do in 3D you cannot do in less than 3D.

只有一种情况下进入三维是有意义的,因为有些事情你能在三维空间内完成,但低于三维就做不到了

耶鲁公开课 - 基础物理课程节选

You cannot go on the Web and find out if you need a hip replacement what a hospital will charge you for that.

NPR: 6 min 38 sec

But there is no spot market: you cannot go to Toyota with your lanthanum and say, well, you use lanthanum in your batteries, buy mine!

FORBES: Investing in Rare Earth Metals: Don't Do It!

You cannot go to a market as long as you are not ready to put full power, full speed and all your energy into that market.

FORBES: Hublot CEO: Average Guy in China Hates Hublot