文法は、私の大嫌いなものですが、ためになります。
tbd
Although I really hate grammar, it's useful.
Grammar, which I hate, is good for me.
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ためになる， タメになる， 為になる
1. to be of benefit, to be beneficial, to be useful, to do one good, to be good for one
tbd
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
もの， もん， モノ， 物
1. thing, object, article, stuff, substance
2. one's things, possessions, property, belongings
3. things, something, anything, everything, nothing
4. quality
5. reason, the way of things
6. used to emphasize emotion, judgment, etc., used to indicate ...
tbd