Strategies
Before we get into the specific nature of sentence error questions, let's take a few seconds to review a few basic hints for the new SAT. There is no longer a penalty for guessing, so make sure that all blanks are filled in. Also, because the questions are now based on passages, you may not be able to easily identify the type of question. That's no big deal. Simply look at the choices and ask yourself what the best option is.
However, that said, sentence error questions still do stick out. As you read along in the passage, you'll find that it is awkward if there is an error. Keep a lookout for that as you look through the material. Additionally, make sure that punctuation conventions are followed and that any verbs agree with their subjects. That should enable you to find many errors with sentences. If you have to, look to other nearby sentences to help you identify the subjects of the verbs.
Example
Like I said, you'll find that the questions are drawn from works that you may have already read. As such, we'll take the opening sentence of The Scarlet Letter and introduce a few errors:
A throng of bearded men, in sad-colored garments and gray, steeple-crowned hats, intermixed with women, some wearing hoods, and others bareheaded were assembled in front of a wooden edifice, the door of which was heavily timbered with oak, and studded with iron spikes.
Now let's say that the section others bareheaded were was underlined. There will be four answer choices. Letter A will always be the 'no change' choice. Here are your choices:
- others bareheaded were
- others bareheaded, were
- others bareheaded was
- others bareheaded, was
Let's take a look at these choices. In answer A, 'were' is the verb, but what does it refer to? Here we may think it means hoods or even men, but we have to go back to the beginning of the sentence to see that the subject is 'throng'. As throng is singular, it does not agree with 'were'. Answer choice A is out. For the same reason, answer choice B is gone. So that leaves us with the question of a comma. The description of the throng is a nonessential element, which means it has to be set off by commas. As a result, we have to have a comma to 'close' the nonessential element of text. That means that D is our best answer.