YOU SAID:

I just crapped my pants

INTO JAPANESE

私はちょうど私のズボンを crapped

BACK INTO ENGLISH

I just crapped my pants.

INTO JAPANESE

私はちょうど私のズボンを crapped しました。

BACK INTO ENGLISH

I've just crapped my pants.

INTO JAPANESE

私はちょうど私のズボンを crapped きた。

BACK INTO ENGLISH

I've just crapped my pants.