YOU SAID:

oh no, i swallowed my gum

INTO JAPANESE

ああ、私はガムを飲み込んだ

BACK INTO ENGLISH

Oh, I swallowed the gum.

INTO JAPANESE

ああ、私はガムを飲み込んだ。

BACK INTO ENGLISH

Oh, I swallowed gum.

INTO JAPANESE

ああ、私はガムを飲みました。

BACK INTO ENGLISH

Oh, I had a gum.

INTO JAPANESE

ああ、私はガムを持っていた。

BACK INTO ENGLISH

Oh, I had a gum.