Chuyển những câu sau sang phủ định và nghi vấn
1 . There are twelve nine years old .
....=> There aren't twelve nine years old......
.....=> Are there twelve nine years old .....
2. He is an engineer .
.....=> He isn't an engineer...
.....=> Is he an engineer ?............
3. That is my teacher .
.....=> That isn't my teacher......
.....=> Is that your teacher ?.......
4 . His name is Tuan .
....=> His name isn't Tuan.
.....=> Is his name Tuan ?....
5 . They are teacher .
....=> They aren't my teacher.......
.....=> Are they your teacher ?......
6 . These are pencil .
....=> These aren't my pencil.......
....=> Are these your pencil ?
7 . My school is in the city .
....=> My school isn't in the city.....
.....=> Is your school in the city ?.....