Sửa câu sau thành câu đúng: I am not think that he is an intelligent boy

Giup voi a ! mon ;-;
Sửa câu sau thành câu đúng : 
1. I am not think that he is an intelligent boy.
2.Nam never waters the flowers . They are dieing  now .
3.Is Mr. Brown and his son teachers ? 
4.You often aren't late for school. 
5.I go to the cinema at the moment.
6.I can't go now .I do my homework .
( tôi cần đáp án đúng nhất, cam )