1. Whenever I visited him, he was not at home.

2. Every time I visited him, he was not at home.

3. At any time when I visited him, he was not at home.
[Are they all the same in meaning?]

4. You may go wherever you like.
5. You may go every place you like.
6. You may go at any place you like.
7. You may go to any place you like.
[Are the four sentences correct and the same? Do we use both 'at' and 'to' as in #6 and #7? Which one is right?]

1, 2, and 3 all mean the same thing. I think #2 is best.

4, 5, 6, and 7 all mean the same thing. The prepositions "at" and "to" are unnecessary, and "at" is wrong in any case. "at" implies a specific place: "I'm at the train station. Can you come and pick me up?"

1. Whenever I visited him, he was not at home.

2. Every time I visited him, he was not at home.
3. At any time when I visited him, he was not at home.

All three sentences have similar meanings and convey the idea that every time the speaker visited him, he was not at home. However, there are slight nuances in the sentence structures:

- Sentence 1 suggests that the speaker visited him multiple times, and each time he was not at home.
- Sentence 2 emphasizes the idea that every single time the speaker visited him, he was not at home.
- Sentence 3 introduces the notion of any time the speaker visited him, which implies that regardless of the specific times, he was never at home during the speaker's visits.

Regarding the second set of sentences:

4. You may go wherever you like.
5. You may go every place you like.
6. You may go at any place you like.
7. You may go to any place you like.

Sentences 4, 6, and 7 convey the same meaning, expressing that there are no restrictions on where the person can go. The key difference is in the choice of prepositions:

- Sentence 4 uses "wherever" to indicate that the person is free to choose any location.
- Sentence 6 uses "at any place," which is less common and can sound slightly awkward. It conveys a similar meaning to sentence 4, emphasizing that there are no limitations on the choice of place.
- Sentence 7 uses "to any place," which is the most common and natural way to express the idea that there are no restrictions on the destination.

Sentence 5, "You may go every place you like," is not commonly used and may sound unnatural. It does not accurately convey the intended meaning.