73677
From what I know, ので differs to から grammatically because you add a な after
な-adjectives for ので. For example:

> その人は意地悪{いじわる}なので、嫌{きら}いです。- I do not like that person because they are mean.

But what would the past tense of this sentence be? Would it be:

> その人は意地悪{いじわる}だった **な** ので、嫌{きら}いです。- I do not like that person because they
> WERE mean.

Is the な before ので necessary for past tense adjectives? I couldn't really find
anything after googling. How does this work?
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2019-12-31T13:27:42.510
73676
2022-02-20T02:48:28.503
2019-12-31T16:24:19.433
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36380
question
grammar
Past tense short な-adjective + ので
な is the attributive form of the copula だ (plain form of です). It is what だ
becomes when that part of the sentence moves from the predicative position to
form a relative clause (sometimes called an adjective clause because it
functions like an adjective):

>   * 部屋がきれいだ - The room is clean  
>
>   * きれいな部屋 - A clean room
>

* * *

There is no requirement for だ→な for sentences ending in verbs (not ending in
だ) for the verb to form a relative clause. **There is no need to insert a な
here because だ was not there to become な.** Inserting な would be grammatically
wrong. The predicative form and the attributive form looks the same for verbs:

>   * この手紙はペンで書いた - This letter was written by a pen  
>
>   * ペンで書いた手紙 - A pen-written letter
>

* * *

The past tense (or perfective aspect) of だ is だった. Even though だ→な when
changing from predicative to attributive, だった remains as だった. **There is no
need to insert a な here either**. Inserting な here would be grammatically
wrong:

>   * 部屋が静かだった - The room was quiet
>   * 静かだった部屋 - The room that was quiet
>

* * *

What precedes ので has to end in attributive form:

>   * Verb: するので
>   * Verb(past): したので
>   * i-adj: 高いので
>   * i-adj(past): 高かったので
>   * na-adj: 静かなので
>   * na-adj(past): 静かだったので
>   * noun: 学生なので
>   * noun(past): 学生だったので
>

* * *

So finally in your sentence:

> その人は意地悪だった **な** ので、嫌いです。 (☓)

There is no need to insert **な** there since だった is already the correct form.
CC BY-SA 4.0
2019-12-31T14:57:37.447
73677
2019-12-31T16:16:53.170
2019-12-31T16:16:53.170
542
542
73676
answer