1. You can read whatever magazine you like.

2. You can read which magazine you like.

3. You can read that magazine you like.
(Which one is right? Are they all grammatical? What is the difference in meaning?)

Only #1 is correct. Well, #3 can be considered correct, too, but it has a much narrower meaning.

In 2, the use of the words "which" is incorrect.

Thank you for your help.

1. You can read whatever magazine you like.

2. You can read any magazine that you like.

3. You may read any magazine that you like.

(Does #1 mean #2? And what about #3? 'Can' sometimes means 'May.' What about in this sentence?

All three mean about the same thing. Technically, "can" and "may" mean different things, but in casual speech, they're about the same!

All three sentences are grammatically correct, but they have slightly different meanings.

1. "You can read whatever magazine you like."
This sentence implies that there is a wide range of magazines available, and you are free to choose any one you prefer.

2. "You can read which magazine you like."
This sentence suggests that there are specific choices or options of magazines, and you can select from those options.

3. "You can read that magazine you like."
This sentence indicates that there is a particular magazine you like, and you have permission to read it. The word "that" implies a specific magazine.

The difference in meaning lies in whether the choices of magazines are open-ended (sentence 1), limited to specific options (sentence 2), or focusing on a specific magazine (sentence 3).