YOU SAID:
I’m under the weather
INTO JAPANESE
私は天気の下にいます
BACK INTO ENGLISH
I'm under the weather.
INTO JAPANESE
私は天気の下にいます。
BACK INTO ENGLISH
I am under the weather.
INTO JAPANESE
私は天気の下にいる。
BACK INTO ENGLISH
I am under the weather.
That didn't even make that much sense in English.