AmitArora456 wrote:
hi, I am confused in the following Sentences.Please Comment:
1. There is a difference between what you can do and what I can do.
2. There are differences between what you and I can do.
3. There are differences in what you and I can do.
Please explain which of the following is/are correct/ wrong and Why??
Welcome to idioms!

[Thankfully the GMAT is limiting the number of idiom based questions].
1 - Correct
2 - Incorrect
3 - Correct
With idioms there isn't much rationale. They are correct because that is how they are conventionally stated. My advice on idioms is to not worry about such small differences like the examples here. Place more focus on seeing meaning differences resulting from word choice.
1) I mistook you for my brother.
2) I mistook you to my brother.
The first sentence uses the correct idiom form "mistook for" and the meaning is clear. The second example uses an incorrect idiom "mistook to" and the meaning is strangely altered to mean that somehow I took you to the wrong location (you didn't want to go to my brother)!
Hope that helps.
KW
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Kyle Widdison | Manhattan GMAT Instructor | Utah
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