Plain form

The plain form is used when speaking casually with family and friends. You have learned the “Vます” form, which is a polite way of speaking (polite form). The plain form is a more informal way of expressing things.

Verbs

Did you notice? The plain form is a general term that includes dictionary form (Vol.6), nai-form (Vol.8), ta-form (Vol.9), and nakatta-form (Vol.8). If you forgot, check the previous lessons again.

Adjectives and Nouns

Forな-adjectives and nouns, you need to add “だ” in the plain form.

Plain Form + と思います

“〜と思います” is used to express one’s thoughts or opinions. The key point is that it is used together with the plain form.

店長

それは変へんだと思おもいます。

I like shopping on my day off.

Before the parIn the explanation above, the plain form was described as being used in casual speech. While this is true when the plain form is used on its own, in this case, the sentence ends with “〜と思います,” which is in the polite ます form. Because of this, the entire sentence remains polite.
Even when the plain form is used, if the sentence structure is polite, the overall tone of the speech remains polite.

Verbs

おまわりさん

すぐ捕つかまると思おもいます。

I like shopping on my day off.

おまわりさん

おそらく、犯人はんにんは強盗ごうとうを計画けいかくしていなかったと思おもいます。

I like shopping on my day off.

チューター

明日あした、雨あが降ふると思おもいます。

I think it will rain tomorrow.

がくせい

テストに合格ごうかくしないと思おもいます。

I think that I will not pass the test.

川田

財布さいふをおとしたと思おもいます。

I think I lost my wallet.

Adjectives

おまわりさん

べつに何なにもおかしくないと思おもいます。

I like shopping on my day off.

るみこ

彼かれはハンサムだと思おもいます。

I think he’s handsome.

ケビン

ホテルの料金りょうきんは高たかいと思おもいます。

I think the hotel prices are high.

Nouns

店長

私わたしは、犯人はんにんは女おんなだったと思おもいます。

I like shopping on my day off.

りゅうじ

彼かれの話はなしはうそだった思おもいます。

I think his story was a lie.