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She is as fast as I or she is as fast as me? Which is correct. I believe it to be She is as fast as I, but I so often hear and see "as me"....
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She is as fast as me.
She can run as fast as I (can run)

In the first instance "as me" compares her with me.
In the second instance, "as I" compares what she can do, with what I can do.
Pretty sure it is more along the lines of: she is as I am.. so.. she is as fast as I am
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In this case "as" is a conjunction so it ought to be "as I". However, people tend to use it as a preposition to an object and thus say "as me". Shakespear would of course cry....
Everything you're saying about 'as' being a one-word preposition is correct. The problem is how you're using 'as' as a one-word preposition. According to dictionary.com's definition, 'as' is only a preposition if followed by a noun telling a "role, function, or status of" something. They used the example "to act as leader". In your examples "She is as fast as me" is NOT correct. "As" is being used as an adverb to describe to what degree she is being. How fast is she? She is as fast as I am. The same misunderstanding goes with the word "than" and similarly in this case "than I" is correct and "than me" is not.
Anonymous According to dictionary.com's definition, 'as' is only a preposition if followed by a noun telling a "role, function, or status of" something.
Not quite. Here are some other examples.

I wouldn’t describe her [as tomboyish]. (adjective)
It’s as simple [as making a choice]. (non-finite clause)
She is as fast [as I am]. (finite clause)

She is as fast as me is also correct Standard English. The preposition is taking a pronoun as complement. Perfectly normal.

Same goes for She is faster than me, of course.
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I think you're right, and I've been an English teacher a long, long time . . . Emotion: smile

That’s correct

The paw patrol stickers in the back look a little shook as I am right now

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