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いつ何時， 何時何時， いつ何どき， 何時なんどき， いつなん時， いつなんどき
1. at any time, at any moment
2. when, at what moment
tbd
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かもしれない， かも知れない
1. may, might, perhaps, may be, possibly
可能，或许，也许
が
1. indicates the subject of a sentence
2. indicates possession
3. but, however, (and) yet, though, although, while
4. and
5. used after an introductory remark or explanation
6. regardless of ..., whether ... (or not), no matter ...
7. indicates a des...
tbd
