Writing question: what's the rule?

Test Preparation SAT Preparation
1

<p>Driving less frequently is one way to save energy; to turn off all appliances when they are not being used is another.</p>

<p>I know that “to turn off” is wrong, but only because it sounds wrong to me. Why is the infinitive wrong there?</p>

2

<p>There should be parallelism between the first half and the second. Driving …; turning …</p>

3

<p>Also, remember that semicolons are used to connect two independent clauses…so, each side of the semicolon needs to be a complete sentence. “to turn off all appliances when they are not being used is another” isn’t a complete sentence, so it can’t be correct here.</p>

4

<p>thanks 10char</p>