as vs now

as

conj
  • Being that, considering that, because, since. 

  • used before a preposition to clarify that the prepositional phrase restricts the meaning of the sentence; specifically. 

  • At the same instant or moment that: when. 

  • Varying through time in the same proportion that. 

  • In the (same) way or manner that; to the (same) degree that. 

  • Functioning as a relative conjunction, and sometimes like a relative pronoun: that, which, who. (See usage notes.) 

  • At the same time that, during the same time when: while. 

  • Expressing concession: though. 

  • Used after so or as to introduce a comparison. 

  • Used to introduce a result: with the result that it is. 

adv
  • Considered to be, in relation to something else; in the relation (specified). 

  • To such an extent or degree; to the same extent or degree. 

  • Used to intensify an adjective; very much; extremely 

prep
  • Introducing a basis of comparison, with an object in the objective case. 

  • In the role of. 

  • by way of 

noun
  • Any of several coins of Rome, coined in bronze or later copper; or the equivalent value. 

  • A libra. 

now

conj
  • Since, because, in light of the fact; often with that. 

noun
  • The state of not paying attention to the future or the past. 

  • The present time. 

  • A particular instant in time, as perceived at that instant. 

intj
  • Indicates a signal to begin. 

adv
  • Used to indicate a context of urgency. 

  • Sometimes; occasionally. 

  • Used to address a switching side, or sharp change in attitude from before. (In this usage, now is usually emphasized). 

  • At the present time. 

  • Used to introduce a point, a qualification of what has previously been said, a remonstration or a rebuke. 

  • At the time reached within a narration. 

  • Differently from the immediate past; differently from a more remote past or a possible future; differently from all other times. 

adj
  • Fashionable; popular; up to date; current. 

  • Present; current. 

How often have the words as and now occurred in a corpus of books? (source: Google Ngram Viewer )