thank you,it's very helpful~

Summer - does this help? "don't have" is a contraction (short) for "do not have" so you would use it to explain you do not have something - like - "I don't have a blue hat" or "I don't have time to see you tonight". In this case "have" means to own or possess something. "haven't" is a contraction (short) for "have not" so you would use it to explain that you did not do something. "I haven't made rice today" or "I haven't been to the movies with you". I this case "have" is a special word for a "tense" in grammar called "perfect". Ha, most english speakers do not know why they use it, they just know to use it!

Thanks to kaali,Tyler and Kat~~~So,the difference is about time?or I can forget "haven't" at all?

Teacher: "Do you have any quarters?" (A quarter is a coin worth twenty-five cents in the U.S.) Student A: "I haven't any." Student B: "No, I don't. I don't have any quarters." When I hear the answer "I haven't any," I ask the student if he learned British English or American English. "Haven't any" is more commonly used in British English.

"Don't have" specifically expresses -not having- something. Examples: "He doesn't have house." "They don't have any money." "haven't" is used as a past perfect indicator word. Examples: "They haven't done anything bad." "He hasn't done his homework yet." "He hasn't driven in five years."