1.Mike has forgotten learn the poem.
2.The train has just come.
3.We haven't a holiday for 5 years.
4.Their parents have been friends since their childhood.
5.Dave has been a student for 2 years.
6.They have known him for many years.
7.She has already visited 3 countries
8.I have read three stories.
9.I think he have made lot of improvement.
