Thursdays With Ron: Sentence Correction (Use of the Phrase “Based On”)
Every other Thursday, our instructor Ron Purewal (known on the Beat the GMAT forums as lunarpower) hosts a free study hall session, called Thursdays with Ron, where anyone can submit questions ahead of time and attend. Ron chooses a few themes from the questions he gets and goes over strategies for them.
In this session, Ron looks into Sentence Correction and describes the correct use of the phrase “Based On.”
Here’s an outline of what Ron covers, with the minute markers. Make sure to watch the video, though, so that you’re able to follow along!
- 00:20 spoken English and written English are very different languages
- 2:10 In written language, “based on” has to modify a NOUN
- 7:12 Ron corrects his original sentence example
- 7:50 In Sentence Correction, you should generally not be concerned with fixing sentences. You should just find the correct answer from the choices given.
If you want to view recordings of past Thursdays with Ron or submit questions for the next live session, which takes place on October 7, you can do so here.

