As or than? Simple Grammar question

<p>Should it be "Twice as many as" or "twice as many than."</p>

<p>"Twice as many as..."</p>

<p>Why is it as and not than?</p>

<p>Here is a question from a PSAT practice test:</p>

<p>This year's benefit game drew nearly twice as many spectators as last year. No error</p>

<p>I picked no error, but the correct response is D, "as last year"</p>

<p>I was really confused. This problem is from an official PSAT practice packet, which I recieved after signing up for the PSATs at my school.</p>

<p>Use "as" because it has already been used in the sentence to set up the comparison.
I am twice as tall as she.
The elephant is three times as tall as that tree. </p>

<p>Use "than" when you are comparing two things without the prior use of "as".
That squirrel is three times heavier than the rat.
That mouse is quieter than the cat.</p>

<p>Oh, I see why it's incorrect..."as" is correct, but the sentence itself is not. "As last year" should be "as last year's game." The game drew people, not the year. Subject-verb disagreement. :)</p>