聞いた事がない

have never heard

→ 聞く
phrase Rare #32,271
have never heard Expresses that the speaker has never heard something before. 事 is often written in hiragana as こと in this expression: 聞いたことがない.
JA: そんなうわさは聞いた事がない。
EN: I've never heard such a rumor.

彼の言うような話は一度も聞いた事がない

I've never heard anything like what he says.

今まで一度もそんなことを聞いた事がない

I've never heard anything like that before.

そんなバカげた聞いた事がない

I've never heard anything so ridiculous.

— ファイト・クラブ (1999)

それほどばかげた意見は聞いた事がない

I've never heard such a ridiculous opinion.