Can a irrealis form verb be combined with the adjective particle "な"


I asked this question because irrealis form and continuative form verbs can be
combined with だ, so can't it be combined with na? I mean it looks
ungrammatical but da goes with it so...




The so-called adjective particle な is only required for certain adjectives,
and only when using that adjective **attributively** to directly modify a noun
or noun phrase. This form of the adjective + な is the so-called **連体形【れんたいけい】
( "attributive form")**, literally the " **form** (形【けい】) for **connecting**
to (連【れん】) a **substantive** or non-inflecting word (体【たい】, from 体言【たいげん】
"substantive word"). The _rentaikei_ for verbs is the same as the dictionary
form, so there is no need for any linking particle to create the attributive
form.

Where you see a verb with だ, you're usually seeing one of two things:

  * `[VERB in dictionary form or ます form]` + です (or だ), or (more commonly) `[VERB]` + の (or ん) + です (or だ)  
This is a kind of explanatory construction. Think of this as a bit like the
English, _" it's that [someone] is [VERB-ing]"_.

  * `[VERB in continuative (stem) form]` + です (or だ)  
The verb here is being used as a noun, a bit like English _" -ing"_ forms.  
頼【たよ】る is a verb, _" to depend on someone"_, and 頼【たよ】り is both the
continuative or stem form of the verb, and (perhaps more commonly) the noun,
_" the person or thing depended upon"_. When followed by だ・です, this 頼【たよ】り is
unambiguously the noun. Noun statements in Japanese require a だ or です
afterwards to form a complete
[predicate](https://en.wikipedia.org/wiki/Predicate_\(grammar\)).

There are cases where the 未然形【みぜんけい】 ("irrealis form", basically "hasn't
happened yet") of a verb can be followed by な, so long as that な is the stem
of the negative auxiliary (suffix) ～ない, and that な is followed by the correct
ending for the syntax (such as ending in ～い for the terminal or attributive,
or ending in ～く for the adverbial, or ending in ～かった for the past tense,
etc.).

I cannot think of any case where the _mizenkei_ of a verb can be followed by だ
or です.




The so-called adjective particle な is only required for certain adjectives,
and only when using that adjective **attributively** to directly modify a noun
or noun phrase. This form of the adjective + な is the so-called **連体形【れんたいけい】
( "attributive form")**, literally the " **form** (形【けい】) for **connecting**
to (連【れん】) a **substantive** or non-inflecting word (体【たい】, from 体言【たいげん】
"substantive word"). The _rentaikei_ for verbs is the same as the dictionary
form, so there is no need for any linking particle to create the attributive
form.

Where you see a verb with だ, you're usually seeing one of two things:

  * `[VERB in dictionary form or ます form]` + です (or だ), or (more commonly) `[VERB]` + の (or ん) + です (or だ)  
This is a kind of explanatory construction. Think of this as a bit like the
English, _" it's that [someone] is [VERB-ing]"_.

  * `[VERB in continuative (stem) form]` + です (or だ)  
The verb here is being used as a noun, a bit like English _" -ing"_ forms.  
頼【たよ】る is a verb, _" to depend on someone"_, and 頼【たよ】り is both the
continuative or stem form of the verb, and (perhaps more commonly) the noun,
_" the person or thing depended upon"_. When followed by だ・です, this 頼【たよ】り is
unambiguously the noun. Noun statements in Japanese require a だ or です
afterwards to form a complete
[predicate](https://en.wikipedia.org/wiki/Predicate_\(grammar\)).

There are cases where the 未然形【みぜんけい】 ("irrealis form", basically "hasn't
happened yet") of a verb can be followed by な, so long as that な is the stem
of the negative auxiliary (suffix) ～ない, and that な is followed by the correct
ending for the syntax (such as ending in ～い for the terminal or attributive,
or ending in ～く for the adverbial, or ending in ～かった for the past tense,
etc.).

I cannot think of any case where the _mizenkei_ of a verb can be followed by だ
or です.

