~は・・・(だ)(plain form)

~は・・・(だ)(plain form)


[noun] は [noun] だ。
[noun] は [なadjective] だ。
[noun] は [いadjective] 。(nothing after the いadjective)


~ is ・・・
If the sentence is in the polite form, regardless of the word after は, all sentence should end in です. However, in the plain form, です changes to だ with [noun] and [なadjective], but the sentence ends without だ if [いadjective] is used after は.


  1. わたしは がくせい だ。
    I am a student.
  2. ジョンさんは かいしゃいん だ。
    John is a company employee.
  3. ジョンさんは しんせつ だ。
    John is kind.
  4. この もんだいは かんたん だ。
    This question is easy.
  5. ジョンさんの おくさんは やさしい。
    John’s wife is nice.
  6. あの ほんは むずかしい。
    That book is difficult.

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