初二英语造句,急,有分啊!

I have learned Englsih for 6 years
They have read the text for an hour
Tom has written two letters
The boys have played basketball for half an hour
The girl has played the piano for forty ninutes
They have planted many trees since 1999
He has collected fifty stamps since last year
She has been to Canada twice since I met her last time
I have learned 2000 words since last year
The children have read many stories since they sat here