Actual Conversations Using Plain Forms

In this lesson, I will introduce how plain forms are used in the actual conversation.

<Example Sentences>
For Verbs
Plain Forms:
きょう　べんきょうする。(with rising intonation) 
Are you going to study today?
ううん、やらない。
No, I'm not.
Polite Forms:
きょう　べんきょうしますか。
Are you going to study today?
いいえ、しません。
No, I'm not.

For な-Adjectives
Plain Forms:
げんき。(with rising intonation)
Are you good?
うん、げんき。
Yes, I'm good.
Polite Forms:
げんきですか。
Are you good?
はい、げんきです。
Yes, I'm good.

For noun + です
Plain Forms:
これ、iPhone。(with rising intonation)
Is this iPhone?
うん、iPhone。
Yes, it is.
Polite Forms:
これ、iPhoneですか。
Is this iPhone?
はい、iPhoneです。
Yes, it is.

<How to say Yes and No>
Polite Forms:
Yes=はい　No=いいえ
Plain Forms:
Yes=うん　No=ううん
*いや=No (this can be both formal occasion and casual occasion)

Reference:
Introduction to Plain Forms
https://anchor.fm/yuya-sato/episodes/Introduction-to-Plain-Forms-enp0g3

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