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as (EN)
adverb, preposition, conjunction

This word can also be a form of:
A (noun)

adverb “as”

as (more/most)
  1. to the same level or amount, the first "as" in the phrase "as ... as ..."
    She can't run as fast as you.

preposition “as”

as
  1. introducing the basis of comparison, the second "as" in the phrase "as ... as ..."
    She performed as well as her teammate.
  2. in the function, position or name of
    He served as treasurer for the club last year.
  3. one thing like another thing
    Use the cloth as a makeshift bandage.

conjunction “as”

as
  1. in the same manner or according to the way that
    Sing as the birds do in the morning.
  2. "as to": leading to the outcome that
    As to the garden, it flourished so well that we had fresh vegetables all summer.
  3. at the exact time that
    As the clock struck twelve, the fireworks began.
  4. in proportion with the change or variation of something else
    As the hours passed, the storm intensified.
  5. for the reason that
    As you were busy, I didn't bother you.
  6. connecting clauses or sentences to show a relationship similar to "that," "which," or "who"
    The book that you need is the same as the one I have.