why this SAT sentence has a comma splice ? please help.

<p>okay , your help will be really appreciated , just help?
question : when you write a research paper , you should first create a( rough outline and then that outline will be modified )as you develop your thesis.</p>

<p>okay , to start with i know that there is an error regarding the sequence . modification should be (modify) agree with ( create ) . the other error lies in a comma-splice ? here, i have chosen : a( rough outline , then you modify that online ) the book said its a comma splice , the correct version is ( outline and then modify that outline ) . why a comma splice in my answer ? a comma splice is the result when you join two independent clauses with a comma ? where is the twp dependent clauses here ?</p>

<p>The errors are shifts in voice and in the subject of parallel ideas. “you should first create” (2nd person pronoun as subject, subjunctive mood, active voice)…and then “outline will be modified” (subject shift to noun, indicative mood, passive voice). The subject shift is illogical since the sentence lists things the person addressed should do. ‘You should do this, and then you should do that’. Not, ‘you should do this, and then the outline will have that done to it’. </p>

<p>Ideally, since the sentence names two things the person addressed (you) should do, the construction should be a single clause with a single subject (you) and a compound verb. (create…modify)</p>

<p>When…paper, you should first create a rough outline and then modify it as you develop your thesis. </p>

<p>In your answer, you repeat the subject for the second verb. This changes the construction from a single subject with a compound predicate to two full clauses with the same subject in each. A comma splice occurs when you omit the coordinating conjunction ‘and’ between the clauses and only use the comma.</p>

<p>You should create an outline, and then you should modify it. (correct)
You should create an outline, then you should modify it. (incorrect)</p>

<p>This becomes even more clear when you move the adverb ‘then’ to some other position in the sentence, as one can do with adverbs. Then you get:</p>

<p>You should create an outline, and you should then modify it. (correct)
You should create an outline, you should then modify it. (incorrect)</p>

<p>i can’t thank you enough :’)</p>