Может здесь лучше использовать не Present Perfect, а Present Simple.
I learn to play the gutar this year.
1. It is cold in December in all parts of the world. No, it isn't.
2. Farmers harvest fruit in spring. No, they don't.
3. It is twenty minutes to nine now. Yes, it is.
4. In spring it rains very often. Yes, it does.
5. Agronomists have a lot of work in the fields. Yes, they do.
6. There are usually many machines in the fields in winter. No, there aren't.
7. This family farm has rather high income. Yes, it does.
8. You write letters to your mother every week. Yes, I do.
9. All our students speak English and German. No, they don't.
The book is written very much and there is no one in replacement, who would read them all. Books - a history and tastes of each era. Some are hopelessly lost their bait, others - actual and read with interest today. Every writer wanted to write for ages, but got it or not, it turns into the next generation.
Объясните, для чего используютмя: "While", "For", "during", и напишите 5 предложений, используя эти слова (соединительные).
while - В то же время. Одновременно с чем то или кем то.
during - В течении времени. На протяжении времени.
For - Для.
1. During the 2000s
2. I stayed in London during a week.
3. You can go swimming, while I am having lunch
4. There is a letter for you.
5. It is a book for children.