立彬の日本語
母はかつて水泳で優勝したことがある。
tbd
My mother was once a champion swimmer.
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母， はは， はわ， かか， おも， いろは， あも
1. mother
妈妈，母亲
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かつて， かって， 嘗て， 曾て， 曽て， 都て
1. once, before, formerly, ever, former, ex-
2. never yet, never before, first time, still not happened
曾经，以前，前-；从未如此，从未有过，首次；还没有发生过
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水泳， すいえい
1. swimming
游泳
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優勝， ゆうしょう
1. overall victory, championship, winning the title
2. (being in) heaven, bliss, perfect contentment
最优，冠军
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ことがある， 事がある
1. (for something) to have occurred, to have done (something)
2. (for something) to happen on occasion
(某事)发生，已完成(某事)；(某事)偶尔发生
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题
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
する， 為る
1. to do, to carry out, to perform
2. to cause to become, to make (into), to turn (into)
3. to serve as, to act as, to work as
4. to wear (clothes, a facial expression, etc.)
5. to judge as being, to view as being, to think of as, to treat as, to use...
做，作，干，执行