Я не понимаю учителя:
1. I don't understand the teacher.
2. I didn't understand the teacher.
3. I will not understand the teacher.
4. I am not understanding the teacher.
5. I was not understanding the teacher.
6. I have not understood the teacher.
7. I had not understood the teacher.
8. I have not been understanding the teacher.
Ты не смотришь хоккей:
1. You don't watch hockey.
2. You didn't watch hockey.
3. You will not watch hockey.
4. You are not watching hockey.
5. You was not watching hockey.
6. You have not watched hockey.
7. You had not watched hockey.
8. You have not been watching hockey.