YOU SAID:

This is just to say I have eaten the baby shoes that were for sale

INTO JAPANESE

これは私が販売されていたベビーシューズを食べたと言うことです

BACK INTO ENGLISH

This is to say that I ate the baby shoes that were for sale

INTO JAPANESE

これは、私が販売していたベビーシューズを食べたということです

BACK INTO ENGLISH

This is that I ate the baby shoes I was selling

INTO JAPANESE

これは私が売っていたベビーシューズを食べたということです

BACK INTO ENGLISH

This means that I ate the baby shoes I was selling.

INTO JAPANESE

これは、私が販売していたベビーシューズを食べたということです。

BACK INTO ENGLISH

This means that I ate the baby shoes I was selling.