Final answer:
To incorporate the present time expression 'often,' the sentence should read 'Aunt Chelo often buys fruits.' Comma rules are varied, but generally, they are used to separate independent clauses joined by a coordinating conjunction, to offset the introductory clauses, and to separate items in a list.
Step-by-step explanation:
To correctly rewrite the sentence with the present time expression, you should place the time expression 'often' after the subject of the sentence and before the verb. Therefore, the rewritten sentence is: 'Aunt Chelo often buys fruits.'
When reviewing sentences for proper comma usage, it's important to understand a few key rules. If two independent clauses (each could stand alone as a sentence) are joined with a coordinating conjunction (like 'and,' 'but,' 'or'), a comma should precede the conjunction. However, if the sentence has a dependent clause (cannot stand alone) followed by an independent clause, a comma isn't necessarily required.
Here are the corrected sentences with proper comma usage:
- I finally found my keys, and I got to work just in time.
- Mrs. Contreras threw out her old coffee table and cleaned the carpet.
- Taking the elevator to the roof, we hoped we could see the skyline and the bay.
- Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
- I let my neighbor borrow my phone because she said hers was tapped by the police.