1. At the beginning of school almost everybody tries to look cool and calm.
Each back-to-school student is wondering what will happen during the new
school year. Most children feel a little shy. But it won't take long for you to
feel at home at school. Перевод​

1) I, he, she, it, we, you, they это обычные местоимения, которые используются когда человек про которого ты говоришь выполняет какое-то действие. He goes to school. I read a book. You gave me an apple. 2) my, his, her, its, our, your, their это притяжательные местоимения которые ставятся перед объектом о котором идет речь. This is my car. It is her cup. Those are their books. 3) mine, his, hers, it's, ours, yours, theirs это тоже притяжательные местоимения, но в отличие от предыдущих в предложении они ставятся после объекта. Либо используются в предложениях в которых нет сказуемого. These are friends of mine. This pen is hers. That house is ours. / Who does owns this car? It's theirs.

1

1) Jane has already finished school. She is at the university.

2) They saw this building last year.

3) My friend will visit me next week, l think.

4) Have you read this book yet?

5) Joe didn't buy a car yesterday.

2

They have already bought a car.

1) общий: Have they already bought a car?

2) разделительный: They have already bought a car, haven't they?

3) альтернативный: Have they already bought a car or a bike?

4) специальный: What have they already bought?

5) к подлежащему: Who has already bought a car?