Which sentence is grammatically correct The lawyer represents persons who have given to the organization or The lawyer represents persons whom have given to the organization?

Answer 1

"The lawyer represents persons who have given to the organization" is grammatically correct.

WHO is used as the subject in a sentence. Generally, a good way to check if WHO should be used is to replace the word with THAT. WHO and THAT perform the same function, except WHO is used for people and THAT is not. If the sentence seems to make sense when using THAT, it usually means that WHO should be used instead of WHOM.

Example:

This is the man WHO was in the park.

Versus:

This is the flower THAT was in the park.

If you replace the word WHO with THAT, you would have: "This is the man that was in the park," which still makes logical sense, despite being grammatically incorrect.

WHOM is used as the object (generally with a preposition).

Examples:

TO WHOM does this book belong?

This is the man OF WHOM I spoke earlier.

WITH WHOM did you go to the supermarket?

Obviously, none of these examples make sense if we use the word THAT in WHOM'S place, so we know that we cannot use the word WHO.