もしかしたら

もしかしたら
adverb
perhaps; maybe; possibly
See also: もしかして (casual variant), もしかすると (formal/written variant)
1. perhaps; maybe; possibly
expresses uncertainty about a possibility; used when speculating about something that might or might not happen
もしかしたら(あめ)かもしれない。
It might rain.
もしかしたら(かれ)()ないかもしれない。
He might not come.
もしかしたら間違(まちが)っているかもしれないが、確認(かくにん)してみる。
I might be wrong, but let me check.

Expresses uncertainty about a possibility — "perhaps," "maybe." Placed at the beginning of a sentence or clause to signal speculation.

PATTERN:
Almost always paired with かもしれない (might be) at the end of the sentence: もしかしたら〜かもしれない.

VARIATIONS:

  • もしかして: shorter, slightly more casual; also used when making a guess about someone ("Could it be that...?")
  • もしかすると: slightly more formal/written
  • ひょっとしたら: similar meaning, slightly more literary
  • ひょっとすると: similar meaning, slightly more formal

NOTE:
もしかして is often used when realizing something: もしかして、(おこ)ってる? (Could it be that you're angry?)