Упражнение 1. Choose the right tense form. 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. 6. The train has just come/has been coming. 7. We haven't been having/ haven't had a holiday for 5 years. 8. She has been teaching/has taught at this school for twenty years.