[مستر خالد غباشى]

Suppose:
I suppose you mean how to use the word suppose.

Pronoun + suppose + full sentence

Supposed to:

Pronoun + to be verb (are,is,were,was) supposed to + verb

e.g.:
I was supposed to learn English by myself, but I opted instead to ask on Ejabat.

You are supposed to do your homework.

Suppose 2:

It can be used like IF

Suppose we do your homework for you, it would save your time, but it would make you weak in English.