@MHAboyz_lover uhnbgfdsa i mean im not great, but for me, i just picture my ideas like i was watching a scene in a film. Then I write what i see. However, thats not very helpful probably lol, so also i'd say to make sure that it's realistic, that the chararcters can move the way you're describing them to. So, for example, if character A threw a punch, and Character B dodged, then A would stumble slightly from the momentum before either jumping back or launching their own attack again (or trying to analyse the opponent maybe). They wouldn't be able to do anything a person wouldn't be able to do (unless if we're talking mha, then quirks might affect this lol). Also take into account their feelings. If A is scared of B, they might try to delay the fight (by trying to negotiate or smth) or go on defense for a while, before maybe starting to fight back. If A is excited for the fight (cough cough bakugo cough), they might immediately launch into an attack and keep on trying to land hits.
yeesh this is kinda long, and i doubt it helped (im definitely not a pro at this), but hehe i hope you dont mind?