How do adverbs become interrogative words?

Now, then, often, always, usually, early, today, recently, next, finally, already, usually, often, rarely, once, never, however, soon, immediately, almost, finally, soon, before, before, sometimes, yesterday.

2) adverbs of place:

Here, there, everywhere, anywhere, in, out, inside, outside, above, below, down, backward, forward, home, upstairs, downstairs, through, along, around, near, closed, past, up, away from, in.

3) Adverbs of Mode:

Carefully, properly, anxiously, suddenly, normally, quickly, well, calmly, politely, proudly, gently and enthusiastically.

4) Adverbs of degree:

More, less, very, quite, so, also, still, quite, perfect, enough, extremely, completely, almost, slightly.

5) interrogative adverbs:

How, when, where and why.

6) Relative adverbs:

When, where and why.

Connective adverb:

How, when, where, why and whether.