Вчем разница этих слов? paradise eden elysium heaven

1. i must brush my teeth. - anyone, most likely some disobedient child.

2. i have to brush my teeth. - a patient of dentist's, a human with diseased tooth.

3. i must tidy my room. - anyone, most likely some disobedient child.

4.i have to tidy my room. - anyone, probably a child.

5. i must take the medicine. - someone with easy form of illness.

6. i have to take the medicine. - most likely, a regular patient

i have my own room. i don't share it with my brother anymore.

my new room is large and light.i have a big bed in it ,a computer table and ,of course, a computer on it ,also there are book shelves ,wardrobe ,drawer,carpet and my favorite toys.