Since I started this radio, I followed polite forms, which are used for a teacher, boss, stranger, shop worker, and so on.

In this lesson, I will introduce plain forms, which are used for such as family members, friends, and someone who are close to us.

Simply, polite forms are used for formal occasion.

Plain forms are used for casual occasion.

Please refer to some examples for both polite forms and plain forms.

Verbs: たべる (eat)

-Polite forms: たべます

-Plain forms:たべる (Dictionary form)

い-adjectives: うつくしい (beautiful)

-Polite forms: うつくしいです

-Plain forms:うつくしい (Drop です)

な-adjectives: きれい (clean, beautiful)

-Polite forms: きれいです

-Plain forms:きれいだ (Replace です with だ)

Noun + です: がくせいです (is/am a student)

-Polite forms: がくせいです

-Plain forms:がくせいだ (Replace です with だ)

Verbs: たべる (eat)

-Polite forms: たべません

-Plain forms:たべない 

い-adjectives: うつくしい (beautiful)

-Polite forms: うつくしくないです

-Plain forms:うつくしくない (Drop です)

な-adjectives: きれい (clean, beautiful)

-Polite forms: きれいではないです

-Plain forms:きれいではない (Drop です)

Noun + です: がくせいです (is/am a student)

-Polite forms: がくせいではないです

-Plain forms:がくせいではない (Drop です)

Reference for U-verbs, Ru-verbs and Conjugation:

https://www.wasabi-jpn.com/japanese-grammar/japanese-verbs-u-verbs-and-ru-verbs-and-conjugation/

Actual Conversations Using Plain Forms

https://anchor.fm/yuya-sato/episodes/Actual-Conversations-Using-Plain-Forms-enqrpc

Plain Forms in Past Tense

https://anchor.fm/yuya-sato/episodes/Plain-Forms-in-Past-Tense-eoe8fp

Actual Conversation Using Past Tense Plain Forms

https://anchor.fm/yuya-sato/episodes/Actual-Conversation-Using-Past-Tense-Plain-Forms-eof5oo

Instagram:

https://www.instagram.com/yuyaman1986