Adverbial or Adjective clause?

[Sohrab]

Hi every one specially those who are behind this site without which I would be a lame horse.My great appreciation should go towards Mr.Allen for his top notch work on "A word in your ear".Here I 've two questions .
In the sentence"I'm wearing the same shoes as you do."what is the function of"AS"?
Is it introducing an adjective or advebial clause?
In the book I'm reading these days it says the short form of the advebial clause in the sentece 'If they stopped, they risked a potentially deadly confrontation with criminals."is "stopping,they risked a potentially deadly confrontation with criminals.'But it never says how it was done.Why we can't use"If stopping,..........."?
I like to thank one more time the people who made this site possible.

[Mordant]

I'm wearing the same shoes as you do.

"As" is a relative pronoun there.

That is an adjectival clause. It describes the type of shoes. It tells us nothing about how you wear them.

"If stopping" would change the meaning of that sentence subtly.

"If stopping" translates to "If they were stopping" because the verb you used in the independent clause is in the past tense. It makes it seem you are less certain that they stopped, because you are now referring to it as a process, something ongoing, as opposed to something concluded.

Person 1: What were they doing in that car? I think they were stopping (perhaps because they were slowing down).
Person 2: If they were stopping, they risked a potentially deadly confrontation with criminals.

Person 1: What were they doing in that car? I think they stopped (perhaps because they appear not to be moving at all).
Person 2: If they stopped, they risked a potentially deadly confrontation with criminals.

"Stopping" makes it seem that we are less certain that they actually stopped.

[Beeesneees]

Would you question the use of 'do' in that sentence, Mordant, or is it another trans-Atlantic difference?

"I'm wearing the same shoes as you are."
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Cheers m' dears!

[Mordant]

To me, Bees, there is a difference.

"Do" seems to suggest you wear them but not necessarily at this time.
"Are" suggests you have them on in this moment.

I'm on the phone with him right now, and he is saying the same thing to me as you do.

I would interpret that to mean that "you" generally says something to the speaker.

If I replaced it with "are," I would interpret that to mean you were both saying it to me about the same time or literally at the same time.

[Beeesneees]

Right, I hadn't thought of the scenario of them not being worn at that moment. I blame the 'Friday evening fluffiness' in my brain :)
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Cheers m' dears!