What are the circumstances under which a man is said to have committed the offence of rape?

IPC Section 375. Rape: the circumstances falling under any of the following seven descriptions: First. Against her will. Secondly. Without her consent. Thirdly. With her consent, when her consent has been obtained by putting her or any person in whom she is interested, in fear of death or of hurt. Fourthly. With her consent, when the man knows that he is not her husband and that her consent is given because she believes that he is another man to whom she is or believes herself to be lawfully married. Fifthly. With her consent when, at the time of giving such consent, by reason of unsoundness of mind or intoxication or the administration by him personally or through another of any stupefying or unwholesome substance, she is unable to understand the nature and consequences of that to which she gives consent. Sixthly. With or without her consent, when she is under eighteen years of age. Seventhly. When she is unable to communicate consent.