1. Choose the right tense form. 1. The birds have already flown/have been flying to the South. 2. Ben has forgotten/has been forgetting to learn the poem. 3. The train has just come/has been coming. 4. John has been painting/has painted in his studio since 10 o'clock. 5. Their parents have been/have being friends since their childhood. 6. Tom has been/ has been being a student for 2 years.

1. Choose the right tense form.

• 1. The birds have already flown to the South. (Действие завершено, результат виден).
• 2. Ben has forgotten to learn the poem. (Действие завершено, забыл и все).
• 3. The train has just come. (Действие только что произошло).
• 4. John has been painting in his studio since 10 o'clock. (Действие длилось долго и, возможно, еще продолжается).
• 5. Their parents have been friends since their childhood. (Состояние, которое длится с прошлого и продолжается).
• 6. Tom has been being a student for 2 years. (Действие, которое длится в течение определенного периода времени и, возможно, еще продолжается. Хотя "has been a student" тоже возможно, "has been being" подчеркивает длительность процесса).