'Suppose' in the Bible

"Do not for a moment suppose that I have come to abrogate the Law or the Prophets: I have not come to abrogate them but to give them their completion.

"Do not suppose that I came to bring peace to the earth: I did not come to bring peace but a sword.

What do you yourselves think? Suppose a man gets a hundred sheep and one of them strays away, will he not leave the ninety-nine on the hills and go and look for the one that is straying?

Or do you suppose I cannot entreat my Father and He would instantly send to my help more than twelve legions of angels?