YOU SAID:

He is looking Out the window At somebody Coming in

INTO JAPANESE

彼は窓の外の誰か探して来る

BACK INTO ENGLISH

He comes looking for someone outside the window

INTO JAPANESE

彼は窓の外の誰かを探しています

BACK INTO ENGLISH

He was looking for someone outside the window

INTO JAPANESE

彼は窓の外の誰かを探していた

BACK INTO ENGLISH

He was looking for someone outside the window