Adverbs of frequency

Hi,
this has been asked more than once I guess, but I decided to put it neatly this way:
Consider: usually, often, rarely, sometimes.
Where is it possible to place them in a sentence? I wrote my choices in blue.



I do it. <--- this is an affirmative sentence.
At the beginning: often (with or without comma), rarely (with comma), sometimes (with or without comma), usually (with or without comma)
Before the main verb: all of them
At the end: usually (with comma), often (with or without comma), rarely (with or without comma), sometimes (with or without comma)

I don't do it. <---- this is a negative sentence.
At the beginning: often (with or without comma), rarely (with comma) sometimes (with or without comma), usually (with comma)
Before the negation: all of them
After the negation: usually, often
At the end: all of them (with or without comma) Note: the comma changes the meaning and the stress in the sentence

Other note: I am aware that the position of adverbs in negative questions influences the meaning.

Thanks in advance.

Argh!  The adverb question again! 
Have you gone through this one yet?  Post:258302

Here's a new take on the subject.  If it doesn't appeal to you, toss it in the trash! 

Safe and typical practice:  Use contracted forms wherever possible.  Then place the adverb of frequency after the first contraction -- or after uncontracted not.  Place sometimes at the beginning:  certainly for a negative sentence, but also good for an affirmative.  Note: rarely and seldom (and never, of course) have negative polarity already, so don't use in a negative sentence.  And don't prepose them unless you want to struggle with the inversions, as Amy points out. 

[I'm, you're, he's, she's, we're, they're] (not) [usually / always / often] ...
[I've, you've, he's, she's, we've, they've] [sometimes / usually / always / often / rarely / seldom / never] ...
[I'll, you'll, he'll, she'll, we'll, they'll] [sometimes / usually / always / often / rarely / seldom / never] ...
[I'd, you'd, he'd, she'd, we'd, they'd] [sometimes / usually/ always / often /rarely / seldom / never] ...
[I, you, we, they] [don't / didn't / haven't / won't / wouldn't / shouldn't / can't / ...] [usually / always / often] ...
[he, she] isn't [usually / always / often] ...
[I, he, she] wasn't [usually / always / often] ...
[you, we, they] [aren't / weren't] [usually / always / often] ...

If no contractions, place after the modal verb.

[I, you, he, she, we, they] [can / could / may / might / will / would / ...] [sometimes / usually / always / often / rarely / seldom / never] ...

No contractions?  No modals?  Just subject followed by a non-modal verb?  Place the adverb of frequency between them.

[I, you, he, she, we, they] [sometimes / usually / always / often / rarely / seldom / never] [go / do / like / want / think / ...]

Not using subject pronouns?  Using nouns instead?  The order doesn't change.

The boys aren't [usually / always / often] ready on time.
The Browns don't [usually / always / often] eat in restaurants.
Fred has (Fred's) [usually / always / often / rarely / seldom / never] recovered from a cold in a week.

CJ

To put it another way, I'd like to say and write sentences like these:  Such perverse desires! 

Often you need to consider too many variables to be able to solve a problem in a reasonable time. OK
Often, you need to consider too many variables to be able to solve a problem in a reasonable time. OK
I also take long rides on my bicycle sometimes, when I have enough time. OK
I also take long rides on my bicycle, sometimes, when I have enough time. OK.  Why another comma?
I often don't check the server status for more than 6 hours. OK
I usually don't need a dicitionary to post about simple subjects, like asking for help in this section. OK

CJ

Most of the research has been done on the vanilla cases, so you'd have to research a lot of these less usual cases on your own.  I'm afraid I don't have any statistics on where each of these adverbs occurs and how frequently, and I don't know where you could obtain them.    I suspect that with intonation you could make just about any position of just about any adverb sound correct, but I don't think that's precisely what you're looking for.

CJ

Or:

-- Do you go to church anymore?
-- Well, I couldn't possibly go any less! 

CJ