Can か follow である?


I know it can't follow だ, but is this possible?




か can follow である in subordinate clauses. For example,

> 真実であるかは不明。Whether it is true or not is unknown.  
>  (You can also say it as 真実かどうかは不明。)

か can also follow だ in subordinate clauses, as @snailboat says. For example,

> なぜだかわからない。I don't know why.




か can follow である in subordinate clauses. For example,

> 真実であるかは不明。Whether it is true or not is unknown.  
>  (You can also say it as 真実かどうかは不明。)

か can also follow だ in subordinate clauses, as @snailboat says. For example,

> なぜだかわからない。I don't know why.

