How to Use "unbutton" with Example Sentences

1. Could you unbutton your shirt for me , please ?
2. Oh my , when did you unbutton all this ?
3. Please unbutton your shirt and let me listen to your heart and lungs .
4. Please unbutton your shirt and let me listen to your heart and lung .
5. You can unbutton the top button always ( provided you 're not wearing a tie ) , the second button usually , the third button only on disco night at the rollerama .