Occur at the Moment of Speaking, Temporary, Specied Time, Now

(+) Subject + To be + Verb (ing) + Complement (Object / Adverb of Time)

(-) Subject + To be + Not + Verb (ing) + Complement.

(?) To be + Subject + Verb (ing) + Complement.

Adverb of Time :

Now, Right Now, At The Moment, Presently, Currenly

Today, Tonight, This Afternoon, This Week, This Semester.

Examples :

(+) Today, I am visiting Factory with my manager.

(-) Today, I am not Visiting Factory with my manager.

(?) Are you visiting Factory with your manager today?