Sentence examples for how can I know from inspiring English sources

Still, how can I know?

How can I know this in advance?

How can I know for sure?

How can I know if IVF will work?

How can I know the extent, and limit, of my powers?

"How can I know where you found these things?" he asked, referring to the jihadi items.

I thought, How much can I know of someone by what he or she leaves behind?" To find out, Dewey-Hagborg took a crash course in biotechnology at Genspace, from which she learned to extract and analyze DNA.

How can I not know what is important, but I can know that, whatever it is, is escaping me?

And, if a Christian, how can I best know God and follow Jesus's example?

And how can I not know or understand the things that happen inside my own body?

How can I let him know to step back?