For some reason, comparative constructions with “than” or “as” give us no end of trouble. Probably the most common lapse is using “than” when “as” is called for — for example, “She raised more than three times as much money in the campaign than Mr. Smith.” But there are more arcane stumbles, as well. Look carefully at all such expressions.

After Deadline http://afterdeadline.blogs.nytimes.com/2013/09/03/struggles-with-than/