4.6 ~MASEN DESHITA Verb Formation


~MASEN DESHITA form
The ~MASEN DESHITA form is the past negative of the ~MASEN form.

"Watashi wa sushi wo tabemasen deshita."  =  "I did not eat sushi."

Verb Stems
The part of the verb before the ~MASEN DESHITA is the verb stem. 

Formation of ~MASEN DESHITA verbs


This part is easy!

From the ~MASU form, chop off the "MASU" and add "MASEN DESHITA."

Step 1:  tabemasu

Step 2:  chop off "MASU"  -->  tabe

Step 3:  add "MASEN DESHITA" --> tabemasen deshita

Nihongo Eigo
 Watashi wa shukudai wo shimasen deshita.
 I did not do the homework.
 Anata wa shukudai wo shimasen deshita.
 You did not do the homework.
 Kanojo wa shukudai wo shimasen deshita.
 She did not do the homework.
 Kare wa shukudai wo shimasen deshita.
 He did not do the homework.
 Watashitachi wa sukudai wo shimasen deshita.
 We did not do the homework
 Anatatachi wa shukudai wo shimasen deshita.
 You (plural) did not do the homework.
 Karera wa shukudai wo shimasen deshita.
 They did not do the homework.