1) I usually don't zip my jacket all the way, i will only zip it halfway.
2) Your bag is unzip.
3) The zip of your bag is not zip properly, it is only halfway.
Just some other advice:
Can someone help me
tocorrect these sentence
You do not need the "to" when you use "help".
Please help me clean my room.
Can you help me correct these sentences?
Help me learn to drive.