1) Choose Present Perfect or Present Perfect Continuous. 1. Nina has been learning/has learned English for 2 years. 2. The birds have already flown/have been flying to the South. 3. They have known/have been knowing him for many years. 4. Mike has forgotten/has been forgetting to learn the poem. 5. The children have been watching/have watched cartoons for 2 hours.

Перевод задания: Выберите Present Perfect или Present Perfect Continuous.

1. Nina has been learning English for 2 years. (Нина учит английский уже два года.) С длительностью продолжающегося действия используем Present Perfect Continuous.
2. The birds have already flown to the South. (Птицы уже улетели на юг.) Already подчёркивает завершённое действие.
3. They have known him for many years. (Они знают его много лет.) Глагол состояния know обычно не используется в форме Continuous.
4. Mike has forgotten to learn the poem. (Майк забыл выучить стихотворение.) Здесь говорится о результате — он забыл.
5. The children have been watching cartoons for 2 hours. (Дети смотрят мультфильмы уже два часа.) Длительность действия выражена формой Present Perfect Continuous.