Очень важно правильно выполнить задания по английскому..

Мы знаем друг друга уже 20 лет. - We have known\have been knowing each other for 20 years.
Мои друзья изучают английский язык четыре года. - My friends have been studying English for 4 years.
Ты выучил эти глаголы? - Have you learnt\learned these verbs?
Мы никогда не были в Японии, но всегда хотели побывать там (посетить эту страну) - We have never been to Japan, but we have always wanted to go there (visit this country.)
Он катается на велосипеде весь вечер! - She has been riding a bicycle the whole evening.
Анна неважно работает в последнее время. - Ann hasn't been working hard lately.
Она не пишет стихи последние три года, но она написала много стихотворений за свою жизнь. - She hasn't write poems for the last 3 years, but she wrote a lot of poems during her life.

- Почему Ты такой грязный? - Why are you so dirty?
- Я играл с Рексом в саду. - I have been playing with Rex in the garden.

Как давно ты ждешь Машу? - How long have you been waiting for Masha?

Чтобы выполнить вторую часть вашего задания, нужно видеть/прочитать текст - все выражения взяты из него! Не хочу вводить вас в заблуждение - сколько переводчиков, столько и переводов! Sorry.

If the textbook you have not, here:
We've known each other for 20 years.
My friends are learning English for four years.
You learn these verbs?
We have never been to Japan, but have always wanted to go there (to visit the country)
He rides his bike all night!
Anna unimportant works lately.
She does not write poems past three years, but she wrote many poems in his life.

- Why are you so dirty?
- I played with Rex in the garden.

How long are you waiting for Masha?

1. We've known each other for 20 years.
2. My friends have been learning English for four years.
3. Have you learnt these verbs?
4. We have never been to Japan, but have always wanted to go there (to visit the country).
5. He has been riding his bike the whole evening!
6. Anna hasn't been working hard recently.
7. She hasn't been writing poems for three years, but she has written a lot of poems in her life.
8. - Why are you so dirty? - I have been playing with Rex in the garden.
9. How long have you been waiting for Masha?

секрет правильного перевода в том, что вы должны красиво перевести без запинки, на правильном русском языке, а не "я есть студент"