^That should be obvious.
@Ren: You need to take a few matches or set some time to learn how to do the motions, by just deciding that you're going to focus on those instead of winning a match or whatever. Next time you play go out and look for opportunities to use the combos or moves you're learning, and go out of your way to focus on inputting them precisely instead of being so caught up in the match that you don't notice what's happening.
To get good execution on basic moves, you should also go into training mode and practice doing the move 10 times in a row. If you pull it off just once, don't leave and call it a day, that doesn't mean anything. You only learned it when you can do it consistently. So try to do it 10 times in a row without failing. By the time you get close to doing it 10 times successfully back to back, you should be much better at doing it.
Since you're just learning these things, you have to keep drilling them into yourself so you don't forget it instantly the moment you stop playing. Eventually it'll become muscle memory and you will be able to do it without thinking about it.