"אני הולך מתי שהוא הולך."

Translation: I go when he goes.

[hombresdays]

Why wouldn't this sentence be "אני הולך כשהוא הולך"?

[Pumbush]

Sounds better than מתי ש

[AlmogL]

It is.

[R_Pink]

Most Israelis would use your sentence, but the one presented is also acceptable.
Please report it in.