Does divorce take effect by saying "the relationship is over" or "everything is over" with the intention of threat, or by saying "you are divorced" in a moment of anger 7 years ago without remembering the number, and does divorce take effect by taking the wife to her family's house and then bringing her back?

The husband's statement to his wife, "Our relationship is over," is a kinayah (allusive divorce) and does not result in divorce unless intended. However, his "yes" in response to her question, "Am I divorced?" is an explicit declaration that results in divorce. Divorce pronounced in a state of anger is effective unless the person has lost consciousness. If the husband is unsure about the number of divorces, the lesser, certain number should be taken. Regarding your statement to your wife, "If you do such and such, then you are divorced," if you intended to effect a divorce, it occurs upon her action. If you intended it as a threat or to prevent her from doing something, the majority of scholars hold that divorce occurs, while some scholars are of the opinion that it does not occur and requires an expiation for a broken oath (kaffarat yameen). It is advised to present the matter to trustworthy scholars.