I don't really understand your question, but a straight is a sequence of 5 cards, like 23456. A flush is 5 cards of the same suit, e.g. 5 diamonds or 5 spades. A draw is a straight or flush that has not been completed, but there are still cards to come. E.g. you hold AQ of hearts, and the flop is Kh 9h 2s. You have a flush draw. A straight/flush draw is a combonation of both. E.g. You have 76 of hearts, and the flop is 9h 8h Ac. You have a straight/flush draw.