Потому что это present continuous.
к тому же данная форма присутствовала в самом вопросе
you must go school and dont late
you must study good
you must get good marks
you mist listen teacher
you must do your homework
you must be careful
you mustnt bit your classmate
you mustnt go late to school
you mustnt bit your teacher
English it is one of bests languages in the world. Someone learns it for many years. Because many people use this language.
As for me, I am keen on this language and learn it for 2 years. Firts reason why I want to know this beatiful language it is beatiful words,great sound. Secondly, if you know English it means that you are clever. You have hobby and something like that. In addition English can help you in the future. I want to visit diferents countries and I must know this language.
English it is very wonderful language. And if you want to learn it you should have good memory. Wish you luck in learning this perfect language.
He was asked about the holidays
The story has been forgotten
Our daughter is sent to the south every summer.
His work won't be finished tomorrow.
A meeting is being held
up at the moment.
John Pemberton invented Coca Cola.
Does Australia produce good wines?
He gave her a video for her birthday.
Should hospitals allow smoking?
Somebody has stolen my purse from my bag.
Maybe all people have TV. I too. I like to watch TV. My favorite telecast is Eagle and Tail. In this program two leadings throw the coin and one has humdred dollars for two days and second has unlimited money. thay travel in each countries. I like this program