1. It usually takes me two hours to do my homework.
2. I am sure tomorrow it will take me an hour to do my homework.
3. Yesterday it took me three hours to do my homework.
***
1. It usually takes me thirty minutes to learn new words.
2. Yesterday it took me ten minutes to learn new words.
3. I am sure tomorrow it will take me an hour to learn new words.
***
1. It usually takes me an hour to clean my room.
2. I am sure tomorrow it will take me three hours to clean my room.
3. Last Saturday it took me two hours to clean my room.
(Вроде так)