After we choose the correct options to complete the sentence, we have the following:
- My mother is cooking dinner while my sisters are cleaning the living room.
or
- My mother cooks dinner while my sisters clean the living.
- In the first answer above, we used the Present Continuous tense in both clauses.
- By doing that, we convey the idea that both actions are in progress at the moment of speaking.
- The Present Continuous tense has the structure:
subject + verb to be (present) + main verb (-ing)
- In the second answer above, we used the Simple Present tense in both clauses.
- By doing that, we convey the idea that both actions habitually happen simultaneously. That is, it is common (usual, frequent) for my mother to cook while my sisters clean.
- Both sentences are correct. Therefore, we must choose which one is better suited to what we wish to express.
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