"There are a variety of gaslighting techniques that an abusive partner might use:
Withholding: the abusive partner pretends not to understand or refuses to listen. Ex. “I don’t want to hear this again,” or “You’re trying to confuse me.”
Countering: the abusive partner questions the victim’s memory of events, even when the victim remembers them accurately. Ex. “You’re wrong, you never remember things correctly.”
Blocking/Diverting: the abusive partner changes the subject and/or questions the victim’s thoughts. Ex. “Is that another crazy idea you got from [friend/family member]?” or “You’re imagining things.”
Trivializing: the abusive partner makes the victim’s needs or feelings seem unimportant. Ex. “You’re going to get angry over a little thing like that?” or “You’re too sensitive.”
Forgetting/Denial: the abusive partner pretends to have forgotten what actually occurred or denies things like promises made to the victim. Ex. “I don’t know what you’re talking about,” or “You’re just making stuff up.”
(Source)"
See the entire article @ the Hotline