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いく， ゆく， 行く， 往く
1. to go, to move (towards), to head (towards), to leave (for)
2. to move through, to travel across, to walk along (e.g. a road)
3. to go (well, badly, etc.), to proceed, to turn out, to get along
4. to do (in a particular way), to go (with; a choice...
去，进行；穿过，走；做，试
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
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd
