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過労， かろう

1. overwork, strain

tbd

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原因， げんいん， げいいん

1. cause, origin, source

原因

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病気になる， 病気に為る， びょうきになる

1. to fall ill, to be taken ill

生病；患病

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彼， かれ

1. he, him 2. boyfriend

他

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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

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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

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で

1. at, in 2. at, when 3. by, with 4. within, in 5. and then, so 6. and, then 7. let me tell you, don't you know

表示范围

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