Examples:

• I still haven't decided what I want there.
• I still haven't decided if that's a good thing or a bad thing.
• If I'll go or not, I still haven't decided.
• I still haven't decided if I'm pressing charges.
• I still haven't decided what I'm gonna do.
• No, I still haven't decided.
• I still haven't decided whether...
• I still haven't decided yet.
• I still haven't decided.
• I still haven't decided.