YOU SAID:
I have the flu and will not be into work on Monday.
INTO JAPANESE
私はインフルエンザにかかっており、月曜日には効力を発揮しないでしょう。
BACK INTO ENGLISH
I have flu and will not take effect on Monday.
INTO JAPANESE
私はインフルエンザにかかっており、月曜日には効力を発揮しません。
BACK INTO ENGLISH
I have flu and will not take effect on Monday.
You've done this before, haven't you.