5. Mustn't/Can't-Not allowed/not possible
Must/Can-Allowed/possible
Have To-Necessary
don't have to/needn't-not necessary
6.Can you collect the flowers before five o'clock please?
You must collect the flowers before five o'clock!
You have to collect the flowers before five o'clock!
Can you wear a suit and tie ,please?
You must wear a suit and tie!
You have to wear a suit and tie!
Can you park the cars in the town car park,please?
You must park the cars in the town car park!
You have to park the cars in the town car park.
