Объяснение.
1. He has finished training.
2. She has scored twenty points in the match.
3. We have watched all the Champions League matches this season. That's amazing!
4. She has run fifteen kilometers this morning!
5. She has bought some really nice roller blades!
6. Oh, no! I have lost my money!
7. My mum has written shopping list. It's on the kitchen table.
8. Dad, you have eaten my biscuit!
9. I’m tired. I have watched three X-Files videos.
10. Hurry up! They have started the film!
11. Mary has studied hard this year, so she'll pass her exams.
12. Oh no! She has dropped the plate!
13. The garden is very green. It has rained a lot this month.
13. These are my favourite trousers. I have had them for five years.
14. Tom's my best friend. I have known him for three years.
15. They have lived in Miami for two years.
16. Jo has earache. He has had it since 7 o'clock.
17. Brad has been living in Chicago since 1998
1) "Упрощение" языка за счет использования символов-эмодзи, картинок-мемов и различных жаргонных выражений, призванных сократить число символов в предложении;
2) Различные формы заимствования интеллектуальной собственности (как правило, что попало в Интернет-уже "общественное достояние");
3) Замещение реальных контактов с живыми людьми виртуальными "друзьями", поощрение социофобий, соблазн создания виртуальной личности с "идеальной" жизнью.
Конечно, это далеко не полный список возможностей и последствий, а только мое видение данной темы.
Negative aspects of Internet communication:
1) "Simplification" of the language through the use of symbols-emoji, picture memes and various slang expressions, designed to reduce the number of characters in the sentence;
2) Various forms of borrowing intellectual property (as a rule, what has got into the Internet is already "public domain");
3) Substituting real contacts with living people with virtual "friends", encouraging social phobias, the temptation to create a virtual person with an "ideal" life.
Of course, this is far from a complete list of opportunities and consequences, but only my vision of this topic.