Предложения на (с переводом) с must mustn't needn't

С обязательным не должны не нужны

I must wear uniform when I go to school.
(я повинен одягати шкільну форму коли я іду в школу)
i needn't do that
( мені не потрібно цього робити)
I mustn't learn something that is not interesting to me
(мені не потрібно робити те що мені не цікаво)

I bought some furniture yesterday.They celebrated Christmas last year.Past Simple 
He was buying some food from 3 till 4 yesterday. We were celebrating my birthday the whole day yesterday.Past Continuous
He had bought some new furniture by 3 o'clock.He hadn't celebrated Halloween  by the evening. Past Perfect. 
We buy milk every day. They celebrate Mother's Day every spring.Present Simple
I am buying bananas right now. What are you celebrating at the moment? Present Continuous
I have just bought a new hat. He has never celebrated it. Present Perfect
He will buy an apartment next year. I will celebrate New Year next winter.Future Simple 
He will be buying a bike at this time next week. We will be celebrating Thanksgiving Day this time next autumn.Future Continuous
You will have bought a new book. He will have celebrated it.Future Perfect

I bought some furniture yesterday.They celebrated Christmas last year.Past Simple 
He was buying some food from 3 till 4 yesterday. We were celebrating my birthday the whole day yesterday.Past Continuous
He had bought some new furniture by 3 o'clock.He hadn't celebrated Halloween  by the evening. Past Perfect. 
We buy milk every day. They celebrate Mother's Day every spring.Present Simple
I am buying bananas right now. What are you celebrating at the moment? Present Continuous
I have just bought a new hat. He has never celebrated it. Present Perfect
He will buy an apartment next year. I will celebrate New Year next winter.Future Simple 
He will be buying a bike at this time next week. We will be celebrating Thanksgiving Day this time next autumn.Future Continuous
You will have bought a new book. He will have celebrated it.Future Perfect