The fifth week we saw continuous present

In the present continuous it has 3 forms, Negative, Affirmative and Questioning its forms to make a present continuous is the following way

The first would be the Affirmative here you have to first the Subject+Verb to be+Verb ing+ Object

 Example: I am Playing Soccer. 

 that would be Affirmative

In the present negative continuous it would be the same but the Not is added for example Subject+Verb to be+Not+Verb ing+Object differently with the previous example with this one it would look like this

Example: I am not Playing Soccer

And with the interrogative it would be the same as the Affirmative but with the difference that that form always has to be added the following sign? And if it does not carry the interrogative sign, will it not be considered as a question, for example Subject+Verb to be+Verb ing+ Object? It would look like this

Example: I'm Playing Soccer?