1. (+) my father Buys new big house every year

(-) my father doesn't buy new big house every year

(?) does my father buy new big house every year

2. (+) her sister sings the pop song every morning

(-) her sister doesn't sing the pop song every morning

(?) does her sister sing the pop song every morning

3. (+) his uncle sent much money for his son last week

(-) his uncle didn't send much money for his son last week

(?) did his uncle send much money for his son last week

4. (+) euti sweeking the garden now

(-) euti is not sweeking the garden now

(?) is euti sweeking the garden now?

5. (+) my mother will cook fried rice next evening

(-) my mother will not cook fried rice next evening

(?) will my mother cook fried rice next evening

6. (+) nina has studied english since the elementary school

(-) nina has not studied english since the elementary school

(?) has nina not studied english since the elementary school?