Как переводится should? Чем отличается от must? Когда употребляется should? Как образуется отрицательная форма?

Глаголы must и have to показывают долженствование, обязанность, но их значения различны. Must подразумевает, что вы верите в то, что должны что-то сделать. Вы считаете это правильным и нужным. Must переводится обычно как «должен», «обязан». Have to переводится словами «приходится», «вынужден» и показывает, что вы должны что-то сделать, так как этого требуют обстоятельства. По этой причине глагол must считается самым «сильным» из глаголов, показывающих обязанность: то, во что мы сами верим, для нас важнее и «обязательнее» всего.

I must go now. It’s getting dark. – Я должен уйти. Темнеет.

I have to go now. It’s getting dark and I won’t catch a taxi to get home. – Я вынужден уйти. Темнеет, я не смогу поймать такси и уехать домой.

Объяснение:

should переводится как должен. отличается от must тем, что это более мягкая форма  говорения. то есть ты говоришь you must go to school -  ты обязан ходить в школу, и, например you should clean your room - ты должен убираться в своей комнате. отрицательная форма - shouldn't и mustn't

students know that Shevchenko was born in 1814. The students knew that Shchevchenko was born in 1814. we didn't know she was sick. we don't know she's sick. we don't know that she was sick. we didn't know she was sick. the boy said he was born in 1985. the boy says he was born in 1985. they say that these dictations were written the day before yesterday. they said these dictations were written the day before yesterday. we don't know what the kids had for dinner from 7 to 8 o'clock yesterday. we didn't know that the kids had lunch from 7 to 8 o'clock yesterday.

Tom Sawyer was in the house of Aunt Poly with Sid and Mary. He went to school on Sundays with his family went to church onservice. Tom did not like to study, but he loved to read about pirates and robbers, naughty and rowdy, even though he was good. Next to the house of Aunt Poly settled girl Becky Thatcher, Tom fell in love. Tom had a lot of friends. With his best friend Huck Finn tramp and Joe Garpugom they were playing pirates on the island and its absence frightened the whole city. With Huck Finn were random witnessed the murder of Dr. Robinson, and, calling the real killer was acquitted an innocent man. Found a treasure and gave the money the city, Tom and Geku open a bank account, and the widow Douglas took Huck to his upbringing.