Definition
Compound sentences are sentences that cointain two ideas (clauses = subject + verb) joined by a coordinating cojunction (these can be "and, but, for, so, or, yet) and they can also be linked by punctuation marks and the use of words like: "however, moreover, besides, as a result, for example,therefore" and several more.
Answer
- Sending quick, irrational replies to upsetting e-mails can be emotionally gratifying; however, it is not wise.
"Sending quick, irrational replies to upsetting e-mails" = SUBEJCT
"can be emotionally gratifying" = VERB
This is the first clause that is linked to the following by the use of the ";" and the word "however".
";however, it = SUBJECT
is not wise.= IS
This is the second clause of this sentence.
We claim that this is a compound sentences because each clause, each idea can be understood independently and they are joined by the use of a conjuction.
- Good writers use parallel estructure in lists to display strong logic(1st clause); bad writers create unparallel lists that lack logic(2nd clause).
"Good writers" = SUBJECT
"use" = VERB
These are the subject and the verb of the first clause.
";" links the two cluses.
"Bad writers" = SUBJECT
"create" = Verb
These belong to the second clause.
- Pie charts should be used to show relationships between parts of a whole, but bar graphs should be used to illustrate differences between variables.
"Pie charts" = SUBJECT
"be used" = Verb
These elements belong to the first independent clause.
",but" = this conjunction joins the two clauses
"Bar graphs"= SUBJECT
"be used" = Verb
These two elements form the second independent idea of this sentence.
INCORRECT SENTENCES
- Informational messages are usually organized in a direct manner but sensitive messages are often indirect to avoid offending the recipient.
In this sentence the conjuction "but" should be preceded by a comma, otherwise it is incorrectly punctuated and it is not a compound sentence. Compound sentences can have the following structure:
1st clause + Comma + Conjuction + 2nd clause =
I am really tired of studying, but I have to graduate some day.
1st clause + Semi colon + Conjunction + 2nd clause =
It was a difficult test; however, I passed it!
1st clause + comma + 2nd clause =
I'm studying right now, I can't go to the movies.