My frnds hymen isbroken.but she did not had penitrative sex.will it bleed again when she does sex for first time.can her partner know abt broken hymen?

See below: How do you the hymen is "broken"? Hymen has variable morphology in different women. What looks like broken, may be normal appearance for your friend. If she has concerns she should see a gynecologist. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. Get HPV vaccine

Hard to say: Some women are born without a hymen, with a minimal shelf, with a irregular contour or break it in non sexual activities in life. It may or may not bleed at the time of any sex, depending on what is there at the time. Her partner will suspect whatever he chooses depending on that experience. Honesty is the best way for people to approach a relationship.