Write sentences about your life at home. Write two with mustard , two with mustn't and two with needn't .

I must help my parents. 
На выбор 

I must clean my flat (my room/my house) every week.
I must go to bed before midnight.
I must water the plants. I must walk my dog.

I mustn't come back home after 9/10/11 p.m. 
I mustn't listen to music too loudly. 
I mustn't use my mother's computer at home. 

I needn't clean my flat every day. 
I needn't cook dinner. 
I needn't clean the windows.
I needn't wash my clothes by hand. (вручную)