I'm trying to say "Taking Japanese class has been [or was] fun" using ものだ.

But I don't think this is right:

> 日本語の授業を受けている楽していたものだ。
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2014-05-01T17:02:41.780
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2015-11-21T13:55:12.073
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syntax
How to say “Taking Japanese class has been fun” using 〜ものだ
I see two big problems with your sentence:

  1. In your sentence, 受けている doesn't relate in a natural way to what follows. 

  2. 楽{たの}しい is an adjective, but you're conjugating it as though it's the non-existent verb 楽{たの}す. (Actually, because the kanji are the same, it looks like a form of 楽{らく}する, but I don't think that's what you intended.)

I think you could simplify it a little, connecting the two parts with 〜て:

> 日本語の授業を **受けていて楽しかった** （です）

Here I used the past form of 楽しい, which is 楽しかった. I put です in because I
imagined that you were talking to your teacher so politeness would be
appropriate, but of course whether you want to be polite depends on context,
so I put it in parentheses.
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2014-05-01T22:22:53.060
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If you must use ものだ/もんだ, I'd suggest

> 日本語の授業を受けるのは楽しいものだ(よ)。  
>  日本語の授業を受けるのは楽しいもんだ(よ)。  
>  日本語の授業を受けるのは楽しい(です)(よ)。
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2014-05-01T22:58:00.783
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2014-05-12T23:29:10.910
2014-05-12T23:29:10.910
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