Viết lại câu sao cho nghĩa không đổi: 1) This is the best computer I have ever used; 2) He hasn't chatted with his classmates throught internet for five years; 3) He has never played a computer game before

Viết lại câu sử dụng các từ gợi ý nghĩa của câu không thay đổi
1, This is the best computer I have ever used
2, He hasn't chatted with his classmates throught internet for five years
3, He has never played a computer game before 
4, We haven't seen her since we left university 
5, He last comeback to his homevillage for five months ago
6, It's three years since I last spoke to her
​Ứng dụng thì hiện tại hoàn thành