Use "must" or "needn't" 1. must i tell the truth? - , it's important. 2. must i go shopping? - we have a lot of food. 3. must i do this work now? - you can do it later. 4. must i type these papers today? - i need them today. 5. must i take the dog out for a walk - i'm busy now. 6. must i come on saturdays? - it's your day off