chenxil Wrote:My apologies for bringing up an old topic, but I still had a slight confusion regarding this question.
I fully agree that subject verb1 AND verb2 works as a conjunction, but how can it work if it is separated by a comma? A comma inherently separates the sentence into two separate clauses, and when joining clauses, coordinating conjunctions should only be used to join independent clauses. I'm not sure how we can just assume that a subject remains when the clauses have been separated by a comma. Of course, omitting objects in parallel constructions is often done (e.g. "I eat ice-cream, just as you do") but I've definitely always been told that omitting subject is not something that the English construction allows.
For example, I would never say, "I ate ice-cream, and slept." "Slept" by itself cannot function as an independent clause and therefore should not be joined by and separated by a comma. Please clarify!
I'll assume you are referring to the "yet" in this sentence. First major lesson is to learn that it is acceptable, but not in the simple version you used:
I ate ice cream and slept.
In this simple example, ate and slept are the only verbs and so there's no confusion about what should be parallel, so we don't want commas to confuse the issue. However, when you have a more complex structure:
I was eating ice cream while we were rafting and sleeping on the bed.
There are now several different possible things for "sleeping" to be parallel with- rafting or eating. Without a comma, sleeping goes back to the closest parallel item. I was eating ice cream while rafting/sleeping. If you include the comma:
I was eating ice cream while we were rafting, and sleeping on the bed.
Now sleeping can attach to a further parallel element. The number one take-away from this is that it is possible to include a comma between parallel elements. The reason why is to make a clearer sentence.
Second, with contradictory conjunctions, such as but, yet, etc., you often need a comma to offset phrases. (although not every writer will agree when to use the comma and when not to... fortunately, you don't need to worry about this on the GMAT)
The puppies were cute, but pooped everywhere.
Even though the subject isn't repeated here, it's completely understood what should be parallel.