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. 9.David has been painting/has painted in his studio since 10 o'clock. 10.Mary and Sam have collected/ have been collecting stamps for 3 years. 11.Their parents have been/have being friends since their childhood. 12.Dave has been/ has been being a student for 2 years.