立彬の日本語

彼はこのことをしなくてもよい。

tbd

He does not have to do this.
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この， こん， 此の， 斯の
1. this 2. last (couple of years, etc.), these, past, this 3. you (as in "you liar")
这个；最近（几年等）、这些、过去、这个；你（例如指“你这个骗子”）
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を
1. indicates direct object of action 2. indicates subject of causative expression 3. indicates an area traversed 4. indicates time (period) over which action takes place 5. indicates point of departure or separation of action 6. indicates object of d...
表示动作的直接对象；表示经过的场所；表示离开或分开的点
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なくてもいい， なくてもよい， なくても良い， 無くても良い
1. need not, (not) have to 2. need not have, need not exist
不必；没有必要；不必如此，不必存在
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彼(かれ)[01]
彼， かれ
1. he, him 2. boyfriend
他
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は
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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事(こと){こと}
こと， 事， 縡
1. thing, matter 2. incident, occurrence, event, something serious, trouble, crisis 3. circumstances, situation, state of affairs 4. work, business, affair 5. after an inflectable word, creates a noun phrase indicating something the speaker does not ...
tbd
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為る(する){し}