Ohh, we're having a SAT exam, I have a tips and I will share it, I know identifying error is a bit tricky.
hope I can help you

first, errors are mostly in verbs and not in nouns, pronouns....

second, repeat and repeat and you will realize that there is something wrong on it.

third, some are dangling modifiers, that we cannot notice.

fourth, some are wrong spelling.

hope I really help you..
identifying error is a trick type of exam.