YOU SAID:
Harry Potter must not go back to Hogwarts
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ハリーポッターはホグワーツに戻ってはいけません
BACK INTO ENGLISH
Harry Potter must not return to Hogwarts
INTO JAPANESE
ハリーポッターはHogwartsに戻ってはいけません
BACK INTO ENGLISH
Harry Potter should not return to Hogwarts
INTO JAPANESE
ハリーポッターはホグワーツに戻ってはいけません
BACK INTO ENGLISH
Harry Potter must not return to Hogwarts
INTO JAPANESE
ハリーポッターはHogwartsに戻ってはいけません
BACK INTO ENGLISH
Harry Potter should not return to Hogwarts
it is unlikely that this phrase will ever reach equilibrium