YOU SAID:

I am looking at student doing their midterms

INTO JAPANESE

私は彼らの中間期をしている学生を見ています

BACK INTO ENGLISH

I'm watching students doing their interphase

INTO JAPANESE

私は学生が間期をしているのを見ています

BACK INTO ENGLISH

I see students doing interphase

INTO JAPANESE

私は学生が間期をしているのを見ます

BACK INTO ENGLISH

I see students doing interphase