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]

昨日の花火は、きれいだったです。

*きのうのはなびは、きれいだったです。

 

▼
▼
▼

 

[My correction]

昨日の花火は、きれいだったです。
→昨日の花火は、きれいでした。
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

e.g.
あの店(みせ)の店員(てんいん)は親切(しんせつ)でした。
The staff at that store was kind/nice.
親切; na-adjective

昔(むかし)は野菜(やさい)が嫌(きら)いでしたが、今(いま)は好(す)きです。
I used to not like vegetables, but now I like them.
嫌い; na-adjective

I hope my explanation helps you. 😊

In the JLPT course, all lessons come with homework, if you submit your homework, I will reply with corrections.
I can break down the Japanese grammar and point out mistakes, explaining the structure and nuances of Japanese in an easy-to-understand way.
You can also ask me any questions as much as you want. I will teach you until you get it!

 

———————————–

Need Support From a Professional Teacher?

The JLPT All-In-One course consists of 180 exclusive modules for each level. The levels are, N5, N4, N3, N2, N1 (N2 consists of 240 modules). You can prepare for the JLPT exam for 10 minutes a day as all JLPT subjects are broken down into daily lessons to maximize quality and quantity.

You will receive emails regarding what you need to study for the day, as well as words of support and guidance in the emails.

Submissions of your completed homework are from your PC, laptop, tablet, or smartphone. Chika Sensei will give you personalized feedback, emboldening your knowledge of the language.

＞＞Click here to tour the course!