YOU SAID:

i am sitting in the morning

INTO JAPANESE

私は午前中に座っています

BACK INTO ENGLISH

I'm sitting in the morning

INTO JAPANESE

私は朝に座っています

BACK INTO ENGLISH

I sit in the morning

INTO JAPANESE

朝は座る

BACK INTO ENGLISH

Sit down in the morning

INTO JAPANESE

朝に座る

BACK INTO ENGLISH

Sit down in the morning