I know this advice is going to be annoying, but just continue with being consistent. And praise her when she does what you ask. Like elli says give her lots of warning even set a timer if you have to. Communication is really important, talking through everything you do, and every time she's in time out etc talk to her about why, get her to respond to you so you know she understands. And praise praise praise!

It can get easier and it will I promise! Goodluck!