Question

Which sentence represents a sequence of events where the understanding comes prior to the completion of the homework?



I understand that you are completing your homework on time.


I understand that you completed your homework on time.


I understand that you did complete your homework on time.

Answer 1

"I understand that you are completing your homework on time."

Explanation: "I understand" is present, and "you are completing" (present continuous) describes an ongoing action not yet finished. The other two use past tense ("completed"/"did complete"), so the completion already occurred.