On a white bus

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On a white bus is a mnemonic device used to commit subordinating conjunctions of the English language to memory. Some letters in this phrase stand for more than one subordinating conjunction.

  • O: only if, once
  • N: now that
  • A: after, although, as
  • WH: where, wherever, when, whenever, whether, while
  • H: How, however
  • I: in case, if, in order that
  • T: though, till, that
  • E: even though, even if
  • B: before, because
  • U: until, unless
  • S: since, so that