Кто нибудь можете сказать кратко об глагола to be предмет​

Глагол TO BE = быть, являться, находиться

Это глагол-связка, который может меняться по лицам.  

В русском языке есть предложения без глагола: «Я студент.», «Он сейчас дома.», «Это интересно.» А в английском языке НЕ БЫВАЕТ предложений без глагола.

Например:  

Я студент. - I am a student.

Он сейчас дома. - He is at home now.

Это интересно. - It is interesting.  

To BE меняется так:

В настоящем времени используем формы am, is, are.

Формы единств. числа: I am, he is, she is, it is

Формы множеств. числа: we are, you are, they are

Примеры:  

Ей пять лет. - She is five.

Он болен. - He is ill. (*в английском нет глагола "болеть", есть выражение "быть больным" - to be ill)

Они из Англии. - They are from England.  

В времени у глагола to be всего две формы: was для единственного и were для множественного числа.

Примеры:

I was at school yesterday. (Я был вчера в школе.)

We were at home. (Мы были дома.)

She was ill last week. (Она была больна на неделе.)

They were in a hurry. (Они спешили.)  

В будущем используем формы shall be и will be.

shall be - c местоимениями первого лица  (I, we)

То есть, I shall be, we shall be,

НО эта форма употребляется всё реже. Британцы и американцы используют сокращенные формы I'll be, we'll be. Так что всё чаще повсюду используют только will (а не shall)

Примеры:

I'll be glad to see you. - Буду рад увидеть тебя.

He'll be busy tomorrow. - Он будет занят завтра.  

Welcom to Saransk.
Saransk is the capital city of the republic of Mordovia, Russia. Our city is located in the Volga basin at the confluence of the Saranka and Insar Rivers, about 630 kilometers east of Moscow. Saransk is very attractive city, with a lot of historical places and museums, especially tourists prefer visit Cathedral. It was built in honor of Fyodor Ushakov - holy, righteous warrior. Cathedral is pretty big and incredibly beautiful. Also it was built in Empire style. Although, tourists can visit Pugachev tent, which is a stone building. According to legend he read his appeal  to the people from the porch of the tent. Not far from this place is located park named after Pushkin, where you can relax and enjoy the beautiful nature. In our city we have a lot of restaurants, such as Big Pig, Malina, Subway, where visiters can have a tasty meal. Ruzayevka is the closest city to Saransk, you can reach this city for about 40 minutes. This city is not only interesting because of architectural monuments, but also because of a special atmosphere of cozy provincial town of railwaymen. Saransk is very beautiful city, with a lot of facilities and historical atmosphere and culture, where you can learn something new and meet new people

I am completely keen on reading. I try to read every day at least a few pages. I like fantasy stories and some adventurous stories. And there is a story of that kind I am eager to read over and over again. Its name is “Harry Potter.” The story was written by a popular British writer J. K. Rowling. And it tells us about a little boy Harry who lives in a family of his aunt. One day he finds out that he is a wizard and should go to study to a school of magic — Hogwarts. And that’s where the story begins. In the following 7 parts we get to know what a great wizard Harry is. He meets new friends, studies, does sport and conquer the most evil magician in the world. These books teach how to be friendly, loyal and strong. They show us how to face difficulties and how important a family and friends are. I love this book for all of this. I have already read it a few times. And I know that I will definitely read it once again.