GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 15 Oct 2019, 04:22

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Use of Comma

Author Message
Intern
Joined: 15 Feb 2012
Posts: 30
Doubt: When to use comma before AND. Since the last election  [#permalink]

### Show Tags

13 Jul 2012, 07:57
1
Hi All there...

I know this post is redundant but i need some clarity on when to use comma in-front of AND.

Below is an example sentence one with comma before AND & one without comma.

1) Since the last election, the lobbying effort initiated by environmental organizations, homeowners, andsmall business owners has increased awareness of pending environmental legislation.

2) Since the last election, the lobbying effort initiated by environmental organizations, homeowners and small business owners has increased awareness of pending environmental legislation.

Please explain the meaning of both the sentence.

For record 1) sentence is the actual Correct GMAT adherent sentence.
Manager
Joined: 20 Dec 2011
Posts: 73
Re: Doubt: When to use comma before AND. Since the last election  [#permalink]

### Show Tags

19 Jul 2012, 10:35
7
2
The comma before the AND in a list of 3 or more items is permissive. That means you may choose to use it, or you may choose to omit it. It tends to be included in non-journalistic writing, but it is commonly omitted in newspapers and magazines. I believe this to be a result of the cost of printing an extra character millions of times.

In deciding to use or not use such a comma, you should consider the meaning.

1.) The main issue with using the comma occurs when we have a sentence structure like this:

I like [A], [potential appositive], and [C].
I like Joe, my brother, and Steve.

In this case, it looks like three items are in a list. However, there are actually only two items with a modifier. This becomes ambiguous. Is Joe being renamed by "my brother" (meaning they are the same thing), or is Joe a different person from my brother? How many people do I like?

This is fixed by omitting the comma before AND:

I like Joe, my brother and Steve.

Now, it is clear that Joe is not my brother, since the only potential modifier here is "my brother and Steve," and it is impossible for Joe to be renamed as both "my brother" and "Steve."

2.) On the other hand, omitting the comma can result in ambiguity. Consider the following example:

I like [plural A], [potential plural appositive].
I like my parents, Joe and Lisa.

In this case, are my parents being renamed by "Joe and Lisa," or are Joe and Lisa separate from my parents? How many people do I like?

This ambiguity would be fixed by adding the comma:

I like my parents, Joe, and Lisa.

Now, it is clear that my parents are separate from Joe and Lisa, since "Joe" cannot rename my parents.

Conclusion: In deciding whether or not to include the comma before the AND in a 3+ item list, consider the meaning and pick the outcome with the least ambiguity. If neither way is ambiguous, then it doesn't matter whether you include the comma or not (unless you work for a company that has a preference, such as a newspaper company).
##### General Discussion
Director
Status: -=Given to Fly=-
Joined: 04 Jan 2011
Posts: 788
Location: India
Schools: Haas '18, Kelley '18
GMAT 1: 650 Q44 V37
GMAT 2: 710 Q48 V40
GMAT 3: 750 Q51 V40
GPA: 3.5
WE: Education (Education)
Re: Doubt: When to use comma before AND. Since the last election  [#permalink]

### Show Tags

13 Jul 2012, 09:05
2
1
Dear Prakash,

It is good practice to put a comma before the FINAL conjunction that comes in a list. In the above sentence, even if the comma before 'and' is omitted, it wouldn't make much of a difference because the list is simple.
Now, let me make things a little more complex:

Since the last election, the lobbying effort initiated by environmental organizations and the red cross, homeowners and soccer-moms, and small business owners has increased awareness of pending environmental legislation.

In such a situation, adding a comma before the FINAL conjunction would make the list easier to read and comprehend.

I hope this clears your doubt.

Regards,

Entwistle
_________________
Intern
Joined: 10 Apr 2012
Posts: 26
Location: Venezuela
Concentration: General Management, Finance
GPA: 3.07
Re: Doubt: When to use comma before AND. Since the last election  [#permalink]

### Show Tags

13 Jul 2012, 13:22
2
@prakash111687
Memorize this!
When listing more two items, always use a comma in-front of AND. By doing this, the sentence becomes clear and avoids the occurence of run-on sentences.
Cheers!
Senior Manager
Status: Final Countdown
Joined: 17 Mar 2010
Posts: 406
Location: United States (NY)
GPA: 3.82
WE: Account Management (Retail Banking)
Re: Doubt: When to use comma before AND. Since the last election  [#permalink]

### Show Tags

13 Jul 2012, 13:54
2
prakash111687 wrote:
Hi All there...

I know this post is redundant but i need some clarity on when to use comma in-front of AND.

Below is an example sentence one with comma before AND & one without comma.

1) Since the last election, the lobbying effort initiated by environmental organizations, homeowners, andsmall business owners has increased awareness of pending environmental legislation.

2) Since the last election, the lobbying effort initiated by environmental organizations, homeowners and small business owners has increased awareness of pending environmental legislation.

Please explain the meaning of both the sentence.

For record 1) sentence is the actual Correct GMAT adherent sentence.

Meaning wise, both the statements are same.
AND is used to separate more than two items in the list before the last item.

eg: Jack is a good linguist he can read,write and speak three languages.

OR

Jack is a good linguist he can read,write, and speak three languages.

Meanwhile,

(i) We should use a comma before AND in enlisting long items,such as

The countrymen were leading the army to the near forest to find the alien which was recently seen by the farmers,search every corner of the small mountains not to leave any space un-discovered,and to win the reward of 5000 gold coins.

(ii) When the last item can stand alone in the sentence OR has a slightly different intended//not very much relevant in meaning than the last items

eg: Monetary policies made by the Govt is very well appreciated by the normal public,businessmen,and the policy will benefit the NRIs who are willing to invest in India.

AND can be used with a comma or without a comma without changing the meaning of the sentence.
When a comma is put before the last item of the list it gives more clarity by separation of various items in the lists.

Hope this works !
_________________
" Make more efforts "
Press Kudos if you liked my post
Retired Moderator
Status: The best is yet to come.....
Joined: 10 Mar 2013
Posts: 484
Doubt: When to use comma before AND. Since the last election  [#permalink]

### Show Tags

22 Apr 2015, 23:13
Can , and be used for two items such as X, and Y?
Is the following sentence correct?
Since the last election, the lobbying effort initiated by environmental organizations and the red cross, and homeowners has increased awareness of pending environmental legislation.
_________________
Hasan Mahmud
Manager
Joined: 05 Nov 2015
Posts: 62
Location: India

### Show Tags

31 Dec 2017, 00:03
4
Whether or not you put a comma before and depends on how you’re using and.

For e.g. when you list your dog’s qualities, you have to use a comma after each quality you list except the one that comes immediately before and. That comma is optional.

Correct : The dog is young, well trained, and good natured.
Correct : The dog is young, well trained and good natured.

By the way, this rule only applies to lists of three or more items. You should not use a comma before and if you’re only mentioning two qualities.

Incorrect : The dog is well trained, and good natured.
Correct : The dog is well trained and good natured.

This is true for proper names, ordinary nouns, verbs, or anything else.

Incorrect : Sam, and Sarah take excellent care of their pets.
Correct : Sam and Sarah take excellent care of their pets.

Incorrect : The dog barks, and plays.
Correct : The dog barks and plays.

Comma Before And That Joins Two Independent Clauses

The word and is a conjunction, and when a conjunction joins two independent clauses, you should use a comma with it. The proper place for the comma is before the conjunction.

On Monday we’ll see the Eiffel Tower, and on Tuesday we’ll visit the Louvre.
The sentence above contains two independent clauses , so it requires a comma before and.

another example :

Correct : It’s cold outside, and I can’t find my coat.

Incorrect : Sam tossed the ball, and watched the dog chase it.
The first clause, Sam tossed the ball could stand on its own as a complete sentence, which means it’s an independent clause. But the second clause, watched the dog chase it, can’t stand by itself as a complete sentence. That means it’s a dependent clause, so we should not use a comma before and.

Correct : Sam tossed the ball and watched the dog chase it.
Manager
Joined: 05 Nov 2015
Posts: 62
Location: India

### Show Tags

31 Dec 2017, 00:24
2
6
1. Use a comma before any coordinating conjunction (and, but, for, or, nor, so, yet) that links two independent clauses.
Example: "I went running, and I saw a duck."

2. Use a comma after a dependent clause that starts a sentence.
Example: "When I went running, I saw a duck."

3. Use commas to offset appositives from the rest of the sentence.

Appositives act as synonyms for a juxtaposed word or phrase. For example, "While running, I saw a mallard, a kind of duck." "A kind of duck" is the appositive, which gives more information about "a mallard."

If the appositive occurs in the middle of the sentence, both sides of the phrase need a comma. As in, "A mallard, a kind of duck, attacked me."

Don't let the length of an appositive scare you. As long as the phrase somehow gives more information about its predecessor, you usually need a comma.

"A mallard, the kind of duck I saw when I went running, attacked me."

There's one exception to this rule. Don't offset a phrase that gives necessary information to the sentence. Usually, commas surround a non-essential clause or phrase. For example, "The duck that attacked me scared my friend" doesn't require any commas. Even though the phrase "that attacked me" describes "the duck," it provides essential information to the sentence. Otherwise, no one would know why the duck scared your friend. Clauses that begin with "that" are usually essential to the sentence and do not require commas.

4. Use commas to separate items in a series.
Example, "I saw a duck, a magician, and a liquor store when I went running."

5. Use a comma after introductory adverbs.
Example : "Finally, I went running."
Example : "Unsurprisingly, I saw a duck when I went running."

6. Use a comma when the first word of the sentence is "yes" or "no."
Example :"Yes, I saw a duck when I went running."
Example :"No, the duck didn't bite me."

7. Use a comma when directly addressing someone or something in a sentence.
Example : My editor often asks, "Christina, is that article up yet?"

8. Use a comma between two adjectives that modify the same noun.
Example : "I saw the big, mean duck when I went running."

9. Use a comma to offset negation in a sentence.
Example : "I saw a duck, not a baby seal, when I went running."
Intern
Joined: 02 Jan 2019
Posts: 23

### Show Tags

16 Jan 2019, 10:32
Is the use of "comma + And" in this sentence correct? It seems like an independent sentence with "his father" as the subject.

Financially unsupported by his doubting family, the young artist ultimately earned its approval and enjoyed some success when he pursued work modeling for fellow artists and photographers, and photos of him graced the pages of a periodical his father read regularly.
_________________
_________________
Regards
K Shrikanth

____________
Please appreciate the efforts by pressing +1 KUDOS (:
Re: Use of Comma   [#permalink] 16 Jan 2019, 10:32
Display posts from previous: Sort by