Present Continuous Tense

Action: Now

Aux. Verb: am, is, are

Verb: present participle (+ing)

Aff. structure

subject+ aux. verb+ verb (+ing)+ complement +.

Neg. structure

subject+ aux. verb+ not+ verb (ing)+ complement+.

Interrogative structure

if question

am, is, are+ subject+ verb (ing)+ complement+?
wh question

wh+ am, is, are+subject+ verb(ing)+ complement+?