読んだよ

I read it

→ 読む
phrase Common #7,859
I read it The past form of 読む (to read) with よ, which adds emphasis or indicates informing the listener. The subject is often omitted and understood from context.
JA: その本、昨日読んだよ。
EN: I read that book yesterday.

全部読んだよ

I read the whole thing.

本は読んだよ

I read the book.

入院してる時にその本は読んだよ

I read that book while I was in the hospital.

この本は小学生の時に読んだよ

I read this book when I was in elementary school.

読んだよ

I read it.

本棚の本は全部読んだよ

I’ve read all the books on the bookshelf.

その本は全部読んだよ

I read the whole book.

この本は高校の時読んだよ

I read this book when I was in high school.

その本なら入院中読んだよ

I read that book while I was in the hospital.

そこのもうほとんど読んだよ

I've already read almost all of that book.

手紙読んだよ

I read your letter.

彼の本は全部読んだよ

I've read all of his books.

読んだよ

I read it.

— オープン・ユア・アイズ (1997)

この本は小学校の時に読んだよ

I read this book back in elementary school.

お前がパパに出した手紙を読んだよ

I read the letter you sent to Dad.

— 大人は判ってくれない (1959)

今日の星占い読んだよ

I read today's horoscope.