Q. How do you express "hearsay"?
A. "~ sou da （～そうだ）" is used to express hearsay (I hear that ~; I heard that ~; People say that ~). It is attached to the plain form of the verb or adjective. It is used when the speaker makes a general report regarding what he/she heard. When using this expression, you are not giving any personal intention. To make it polite, "~ sou desu" is used instead of "~ sou da".
|Kono eiga wa totemo ii sou da.
|I heard that this movie is very good.|
|Kino yuki ga futta sou
|I heard it snowed yesterday.|
|Kare wa shigoto o
yameta sou desu.
|I heard that he quit his job.|
|Kanojo wa bengoshi da sou da.
|I heard that she is a lawyer.|
Information sources are expressed by "~ ni yoru to (according to ~)".
|Tenki-yohou ni yoru to
ashita ame ga furu sou desu.
|According to the weather forecast,
it will rain tomorrow.