Step 1: The past continuous tense ("was working")
- The phrase "was working" is in the past continuous tense. This tense is used to describe an ongoing action or event that was happening at a specific point in the past. In this case, the action of working was ongoing when another event occurred. So, "was working" correctly conveys the idea of an action happening in the background.
Step 2: The simple past tense ("received")
- The verb "received" is in the simple past tense. This tense is used to describe a completed action that occurred at a specific point in the past. In this context, "received" refers to an event that happened while the person was working, interrupting or occurring during the ongoing action.
Conclusion:
- The past continuous tense ("was working") effectively indicates an ongoing action, while the simple past tense ("received") shows the completed action that occurred during the ongoing event. This is the correct way to structure sentences where one event is interrupted by another in the past.
So, the sentence is grammatically correct!