Example sentences
Formation
(i) {V/Adjective い}informal nonpast | んだっけ | |
{話す/美味しい}んだっけ | Does someone talk?/Is something delicious? | |
(ii) {V/Adjective い}informal past | (んだ) っけ | |
{話した/美味しかった}(んだ) っけ | Did someone talk?/Was something delicious? | |
(iii) {Adjective なstem/Noun/Wh-word} | (なん)だっけ | |
{元気/学生}(なん)だっけ | Is someone healthy/a student? | |
{なん/誰/どこ/いつ}(なん)だっけ | What/who/where/when is it? | |
(iv) {Adjectiveなstem/Noun/Wh-word} | だった(んだ) っけ | |
{元気/学生}だった(んだ) っけ | Was/is someone healthy/a student? | |
{なん/誰/どこ/いつ}だった(んだ) っけ | What/who/where/when was/is it? |