We don't have any context, so this might be wide of the mark, but I'm going to assume it's something like...
So long as you are cleanly and modestly clothed, you can dress how you want/will.
Having narrowed things down a bit, my first observation is that many if not most speakers would actually say however rather than how in such a sentence. But I really can't offer any support for that observation, nor suggest any good reason why it should be so.
What I will say is that how you will has (to me at least) significant overtones of being archaic, literary, and/or 'perfunctorily dismissive'.
That's to say, how[ever] you want suggests an indulgent speaker willingly granting his audience the freedom to choose, possibly even with the implication that the exercising of that freedom may be desirable from his point of view too. Whereas how you will suggests that the speaker either doesn't care about such details at all, or does care, but knows he's unable to enforce his will.
Yes. Continuous means from some start to some end without break:
The water flowed continuously over the dam.
whereas continual means occurring repeatedly at intervals over a time span:
I continually lose at poker.
I should also mention that continual is often substituted for continuous, and would be correct in most contexts, however the converse is not generally true. That is to say,
The water flowed continually over the dam.
is okay, but you would (hopefully) not mean
I continuously lose at poker.
since that would imply that all you do all day long is play poker and lose.
Best Answer
Both of them can be used perfectly in cases when you want to present a choice or if you actually want to ask someone's opinion on something.
For example, both versions
can be understood (from context) as
Differences: