The present continuous is used to talk about an action that isn’t finished/completed.

Forms of the present continuous :

– Affirmative form : Subject + to be + verb -ing (eg. I am planning a birthday surprise).
– Negative form : Subject + to be + not + verb -ing (eg. I am not planning a birthday surprise).
– Question form : To be + subject + verb -ing (eg. Am I planning a birthday surprise ?).