YOU SAID:

I think the milk has gone bad.

INTO JAPANESE

私は牛乳が悪くなったと思います。

BACK INTO ENGLISH

I think milk has got worse.

INTO JAPANESE

牛乳は悪化していると思います。

BACK INTO ENGLISH

I think milk is getting worse.

INTO JAPANESE

牛乳は悪化していると思います。

BACK INTO ENGLISH

I think milk is getting worse.