1 My brother watered flower.
--did your brother water flower?
--what did your brother do?
2 my brother is watering flower.
--is your brother watering floweer?
--what is your brother doing?
3 my brother is going to water flower.
--is your brother going to water flower?
--what is your brother going to do?
4 my brother waters flower.
--does your brother water flower?
--what does your brother water?