YOU SAID:

This suitcase can't go on the plane because it is too heavy

INTO JAPANESE

このスーツケースは重すぎて飛行機には乗れない

BACK INTO ENGLISH

This suitcase is too heavy to get on the plane.

INTO JAPANESE

このスーツケースは重すぎて飛行機に乗れない。

BACK INTO ENGLISH

This suitcase is too heavy to get on the plane.