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, I'll go instead.

如果你不能去，那么我就替你去。

youdao

If you cannot go, let him go instead.

如果你不能去，让他替你去。

youdao

If you cannot come up with a solid go-to-market strategy, then you should probably not start the business.

FORBES: The LinkedIn IPO: A Valuable Lesson for Entrepreneurs

If you cannot answer these questions clearly, you probably need to go back to the drawing board and be sure you are in the right place before you engage the general public in funding your business.

FORBES: Why We Chose Crowdfunding For Our Product (Should You?)

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