Please note, dear novice swimmers. Before I allow you to enter the pool area, I would like to explain the rules of conduct. First of all, before swimming in the pool, each of you should take a shower. While swimming, you can use special glasses, but you also need to wear a swimming cap. You are not allowed to bring Pets or bring food or drinks into the pool area. It is also forbidden to push and run around the pool or you may fall and break. You can't shout or listen to loud music. You can only dive from special bollards designed for this purpose. If you have any questions, you should ask them now. If there are no questions, let me thank you for your attention. I hope that you will enjoy swimming.
1) My friend came back from business trip yesterday. Our teacher has asked me twice today.
2) The plane has just landed. He gave me his notes last week.
3) She has sent three letters to this firm already. They did the exercises quickly yesterday.
4) The workers have gone to the meeting already. He asked many questions last lesson.
5) I have spoken with my boss already. They went to the seaside by train last summer.
Объяснение:
Past Simple Tense:
1) Действие закончилось в
2) Есть указатель времени в вчера, на неделе летом, в 2001 году и т.п.
Present Perfect:
1) Когда произошло действие неважно, важен результат: самолет приземлился, письма отправили, работники уже ушли.
2) Отрезок времени не указан или еще не закончился: сегодня (сегодня еще не закончилось), на этой неделе (эта неделя еще продолжается), в этом году (этот год все еще продолжается) и т.п.
