Đổi các câu khẳng định(+) ra phủ định(-) và nghi vấn(?):
1,+ He wrote a book.
2,+ She was my box.
3,+They built a new house.
4,+ I was at the concert last Sunday
5,+ I bought clothes in this little shop.
6,+They were born in Korea.
7,+We swam in the lake.
8,+ We were at the gym last week.
9,+ She want to her office by car.
10,+He was a good boy.