YOU SAID:
do not say you did not do your homework.
INTO JAPANESE
宿題をしなかったと言わないでください。
BACK INTO ENGLISH
Do not say that you did not do your homework.
INTO JAPANESE
宿題をしなかったと言ってはいけません。
BACK INTO ENGLISH
Do not say that you did not do your homework.
That didn't even make that much sense in English.