aspect N5 essential casualpolitewritten
〜でいる — voiced allomorph of 〜ている
〜でいる ・ でいる
Builds on て形
Meaning
- = ている, used after a verb whose て-form voices to で (読む → 読んでいる) — same meaning, just the で-form
Key sentence
子どもが本を読んでいる。
A child is reading a book.
Easily confused with
See 〜でいる in real sentences
Jengo shows 〜でいる the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled with reference to A Dictionary of Basic Japanese Grammar. Editorial confidence: medium.