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まだ， いまだ， 未だ
1. still, as yet, only
2. (not) yet
3. more, (more) still
4. at least, comparatively, relatively
5. unfinished, incomplete, not yet done
至今，迄今为止，仅有；还(没有)、尚未；更多，（更多）依然；至少，相对而言，相比之下；未完成的，不完整的，尚未完成的
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何かあったの， なにかあったの
1. did something happen?, what's with you?, what's wrong?, what's cooking?
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
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
