YOU SAID:

I guess you forgot about me...

INTO JAPANESE

私はあなたが私を忘れてね.

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I forgot my you...

INTO JAPANESE

私は私を忘れてしまった.

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I have forgotten my...

INTO JAPANESE

私が忘れてしまった私.

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I've forgotten my...

INTO JAPANESE

忘れました

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I've forgotten

INTO JAPANESE

忘れました

BACK INTO ENGLISH

I've forgotten