Задание 3. Найдите и исправьте ошибки: 1) He is preferring tea to coffee. 2) They have been played football every weekend. 3) I am having a dog, but I don’t want to tell you. 4) She has been write an essay for the last two hours.

1. He prefers tea to coffee. Глагол prefer обычно не употребляется в форме Continuous.
2. They play football every weekend. Здесь говорится о регулярном действии, поэтому нужен Present Simple.
3. I have a dog, but I don’t want to tell you. Глагол have в значении «иметь» обычно употребляется в Present Simple.
4. She has been writing an essay for the last two hours. После has been нужен глагол с окончанием -ing.

Ответ: 1) prefers; 2) play; 3) have; 4) has been writing.