YOU SAID:
I shall destroy pen pineapple apple pens
INTO JAPANESE
私はペンパイナップルリンゴペンを破壊しなければなりません
BACK INTO ENGLISH
I must destroy the pen pineapple apple pen
INTO JAPANESE
私はペンパイナップルリンゴペンを破棄しなければなりません
BACK INTO ENGLISH
I must destroy the pen pineapple apple pen
You've done this before, haven't you.