Conditions, hopes, and the word for something that already happened.

• إِنْ
  if; not

  in

  conditional · 697×
• إِذَا
  when, whenever

  idha

  conditional · 409×
• إِذْ
  when, at the time when

  idh

  adverb · 239×
• لَوْ
  if (hypothetical)

  law

  conditional · 201×
• لَوْلَا
  if it were not for; why not

  lawla

  conditional · 75×
• لَمَّا
  when, after; not yet

  lamma

  adverb · 156×
• لَعَلَّ
  perhaps, so that, in the hope

  laalla

  particle · 123×
• عَسَىٰ
  perhaps, it may be that

  asa

  particle · 30×