YOU SAID:

I have trouble understanding why you use this much toilet paper in one evening

INTO JAPANESE

私はあなたがこの沢山のトイレットペーパーをなぜ夕方に使うのか理解できない

BACK INTO ENGLISH

I can not figure out why you use this many toilet paper in the evening

INTO JAPANESE

でも　なぜあなたがそんなことをするのか 最初は　わからなかった

BACK INTO ENGLISH

But at-at first, I-I could not figure out why you would do something like that.

INTO JAPANESE

でも　なぜあなたがそんなことをするのか 最初は　わからなかった

BACK INTO ENGLISH

But at-at first, I-I could not figure out why you would do something like that.