Page 409 - Basic Japanese

Dore o tsukatte mo kamaimasen yo.

You may use any one of them.

Dono shinbun o mite mo ano nyūsu ga kaite arimashita.
No matter which newspaper I read, I could see
that news.

8.4. The provisional mood ( -reba)

The provisional mood has meanings something like ‘if
something happens (now or in the future); provided
something happens.’ It is made by adding the following

endings to the stems of verbs and adjectives:

Vowel verbs: -reba

Consonant verbs: -eba

Adjectives: -kereba

The provisional of the copula da is irregular: nara ‘if it is,
provided it equals.’ The provisionals of kuru and suru are

kureba and sureba.

Meaning Imperfect Provisional

Vowel verb eats tabe-ru tabe-reba

looks at mi-ru mi-reba

Consonant returns kaer-u kaer-eba
verb wins kats-u kat-eba

buys ka-u ka-eba