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Does this sentence make sense?

> 山本さんは水曜日の食事 **が** 体に悪いと思います。

It's supposed to mean:

> I think Yamamoto's Wednesday meal was unhealthy (lit. bad for the body)

I'm particularly unsure about my use of the particle が.
CC BY-SA 3.0
2016-03-29T10:47:03.247
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2016-04-13T00:57:22.040
2016-04-13T00:57:22.040
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question
translation particle-は particle-が
Does this sentence make sense?
I'm a bit unsure towards whom this line is supposed to be addressed. I'm
answering this based on the assumption that you are not talking to 山本

> 山本さんは水曜日の食事が体に悪いと思います。

I think this means "Yamamoto-san thinks [someone's] Wednesday's meal was bad
for [someone's health]."

I'd make the following changes:

  1. 山本さんは → 山本さんの

  2. 食事が → 食事は (mostly because of the previous change)

  3. 体に悪い → 体に悪そう

  4. 思います is no longer needed after the 悪い → 悪そう change.

I ended up with:

> 山本さんの水曜日の食事は体に悪そうでした。
>
> Yamamoto's Wednesday meal looked unhealthy.

If you were talking to 山本 directly, it probably sounds more natural if you
have ending particles such as よ or ね (or both).
CC BY-SA 3.0
2016-03-29T16:55:34.853
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If you suppose a 山本 who is unhealthy is asking the doctor what's wrong with
him, and the doctor replies as it's his Wednesday meal that does harm,
山本さんは水曜日の食事がからだに悪い **のだ** と思います works and it's natural.
CC BY-SA 3.0
2016-03-30T05:11:15.930
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2016-03-30T05:11:15.930
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> I think Yamamoto's Wednesday meal was unhealthy.

If this is what you want to say, I think you can say:

>   * 山本さんの水曜日の食事 **は** 、体に悪かったと思います。/ 体に良くなかったと思います。  
>  lit. "I think Yamamoto-san's Wednesday meal was bad for health. / not good
> for health."  
>  (more literal to "I think Yamamoto's Wednesday meal was unhealthy.")  
>  OR
>   * 山本さんは、水曜日の食事 **が** 体に悪かったんだと思います。/ 体に良くなかったんだと思います。  
>  lit. "As for Yamamoto-san, I think his Wednesday meal was bad for health. /
> not good for health."  
>  (which is closer to "As for Yamamoto-san, I think the problem was his
> Wednesday meal." / "I think Yamamoto-san's problem is that his Wednesday
> meal was unhealthy.")
>

* * *

Your sentence:

> 山本さんは水曜日の食事が体に悪いと思います。

sounds a bit unnatural... You could instead say:

> 山本さんは水曜日の食事が体に悪いと思 **っています** 。

to mean "Yamamoto-san thinks that (every) Wednesday meal is unhealthy", or

> 山本さんは水曜日の食事が体に悪 **かった** と思 **っています** 。

to mean "Yamamoto-san thinks that his Wednesday meal **was** unhealthy."
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2016-03-30T05:36:16.257
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2016-03-30T05:51:46.940
2016-03-30T05:51:46.940
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