

もしかして、田中さんですか。
もしかして、財布を家に忘れたの?
あの人、もしかして有名な歌手じゃない?
"もしかして" is in the lesson "Adverbs 2" (Level 31), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.