Dear ATEGgers,

To me, the grammatical difference between which and as is that basically
which refers to a noun, while as refers to a verb.  Of course they expand
their reference.  When the reference to a verb is synonymous to reference
to the verb and its object, either works. 

But: 
He has a terrier, as his neighbor has.  
        They both have terriers.
He has a terrier, which his neighbor has.
        The neighbor is keeping the dog while the owner is on vacation.

Then when you get to adjectives: 
He is busy, as was expected.
        As refers to is busy.
He is busy, which was expected.
        Busy is assumed to mean a busy person, I guess, 
        or it could refer to the whole clause, that he is busy..

Anybody have a better answer to an interesting question?

Carolyn Hartnett

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