Category grammar

Causative passive

Causative-passive forms of verbs

kaku, "write", becomes kakaserareru or {{different|kakasareru}}

tatsu, "stand", becomes tataserareru or {{different|tatasareru}}

yomu, "read", becomes yomaserareru or {{different|yomasareru}}

miru, "see", becomes misaserareru

kakeru becomes kakesaserareru

kuru, "come", becomes kosaserareru

suru becomes sesaserareru or {{different|sareru}}

Type of verb	Ending	Examples
consonant stem	-serareru
vowel stem	-saserareru
kahen	-saserareru
sahen	-saserareru

For the consonant stem verbs, instead of -se-rareru forms, the {{different|-sareru}} forms (shown in red above) also commonly occur. The ending -serareru is gramatically correct for consonant stem verbs. But the -sareru forms are more common than the -serareru forms. However, for vowel stem and kahen verbs, -sareru forms do not exist. For example, mi-sareru, kake-sareru, ko-sareru are impossible.

This consonant stem sareru causative-passive verb ending usually doesn't appear in textbooks. Now let's consider what the -sareru forms of passive causative are. Perhaps they are either:

Thus yarasu can be used as a consonant stem verb, although the usage is not standard. Examples of yarasu

Verb form	Example
Mizenkei	Kare ni sono shigoto wa yarasanai* hō ga yoi.
Ren'yōkei	Kare ni sono shigoto o yarashi* mashita.
Shūshikei	Sono shigoto wa kareni yarasu*.
Rentaikei	Sono shigoto o kare ni yarasu no wa yamero.
Kateikei	Sono shigoto wa kare ni yaraseba* yoi.

The forms marked with '*' above are not natural but may be possible. The rentaikei form of yarasu is quite possible. So it can be said that yarasu itself is a consonant stem verb.

References