ДАЮ 25 БАЛЛОВ
1.Nina has been learning English for 2 years.
2.The birds have alredy flown to the South.
3.They have known him for many years.
4.Mike has forgotten learn the poem.
5.The children have been watching cartoons for 2 hours.
6.The train has just come
7.We haven’t had a holiday for 5 years.
8.She has been teaching at this school for twenty years.
9.David has been painting in his studio since 10 o’clock.
10.Mary and Sam have been collecting stamps for 3 years.
11.Their parents have been friends since their childhood.
12.Dave has been a student for 2 years.
ОБЪЯСНИТЕ КРАТКО ПОЧЕМУ В ПРЕДЛОЖЕНИЯХ ИСПОЛЬЗУЕТСЯ ИМЕННО ЭТО ВРЕМЯ(present perfect или present perfect Continuous)