[JLPT grammar] na-adjective’s past tense of polite style is 〜でした.

Today I am going to share the homework correction quoted from my JLPT N5 course!
The student’s sentence is not correct. Can you find the mistake?


[Student’s sentence]





[My correction]

Yesterday’s fireworks were beautiful.

きれい is a na-adjecitve, and na-adjective’s past tense of polite style is 〜でした.

na-adjective, polite style
きれい|です non-past
きれい|じゃありません non-past, negative
きれい|でした past
きれい|じゃありませんでした past, negative

The staff at that store was kind/nice.
親切; na-adjective

I used to not like vegetables, but now I like them.
嫌い; na-adjective

I hope my explanation helps you. 😊


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