Grammar Point
expressions (phrases, clauses, etc.)
exp 
そうだ

people say that, it is said that, I hear that

after plain form of a verb or adjective

Plain form + そうだ

When used after the plain form of verbs, adjectives, or nouns, this grammar point indicates that the speaker is reporting information they heard from another source.

Verb

Use the plain form of the verb (present or past) followed by そうだ.

I hear that he will go to Tokyo.

I heard that she bought a car.

い-Adjective

Use the plain form of the い-adjective (present or past) followed by そうだ.

I hear that the movie is interesting.

I heard that the weather was cold.

な-Adjective

Use the plain form of the な-adjective (including だ for present tense) followed by そうだ.

I hear that the town is quiet.

I heard that the room was clean.

Noun

Use the plain form of the noun (including だ for present tense) followed by そうだ.

I hear that person is a teacher.

I heard that yesterday was a holiday.

Note

When reporting hearsay, the word before そうだ must be in its plain form. This includes the use of だ for nouns and な-adjectives in the present tense. To specify the source of the information, the phrase ~によると (according to ~) is often used at the beginning of the sentence.

Words: 
そうだ
Radicals of radicals