YOU SAID:

The duck had forgotten his gherkin

INTO JAPANESE

アヒルは彼のガーキンを忘れていた

BACK INTO ENGLISH

The duck forgot his gherkins.

INTO JAPANESE

アヒルはガーキンを忘れた。

BACK INTO ENGLISH

The duck forgot the gherkin.

INTO JAPANESE

アヒルはガーキンを忘れた。

BACK INTO ENGLISH

The duck forgot the gherkin.