Hãy chuyển các câu sau thành câu phủ định và nghi vấn .
1.they watched a good footballmatch on tv last night.
2.Peter sent that letter to Marry yesterday morning .
3.Jane's mother bought a new car last month.
4.We visited Ha Long Bay three years ago.
5.They left toHai Phong in 1999.
6.They built a new school in my village ten month ago.
7.I borrowed a lot of book in the library last weekend