English verb conjugation
CAN FLAG

Regular verb: flag - flagged - flagged

Affirmation

Simple form	V-ing form
I can flag you can flag he can flag we can flag you can flag they can flag	I can be flagging you can be flagging he can be flagging we can be flagging you can be flagging they can be flagging
Perfect	V-ing perfect
I can have flagged you can have flagged he can have flagged we can have flagged you can have flagged they can have flagged	I can have been flagging you can have been flagging he can have been flagging we can have been flagging you can have been flagging they can have been flagging

Negation

Simple form	V-ing form
I cannot flag you cannot flag he cannot flag we cannot flag you cannot flag they cannot flag	I cannot be flagging you cannot be flagging he cannot be flagging we cannot be flagging you cannot be flagging they cannot be flagging
Perfect	V-ing perfect
I cannot have flagged you cannot have flagged he cannot have flagged we cannot have flagged you cannot have flagged they cannot have flagged	I cannot have been flagging you cannot have been flagging he cannot have been flagging we cannot have been flagging you cannot have been flagging they cannot have been flagging

Interrogative form

Simple form	V-ing form
can I flag? can you flag? can he flag? can we flag? can you flag? can they flag?	can I be flagging? can you be flagging? can he be flagging? can we be flagging? can you be flagging? can they be flagging?
Perfect	V-ing perfect
can I have flagged? can you have flagged? can he have flagged? can we have flagged? can you have flagged? can they have flagged?	can I have been flagging? can you have been flagging? can he have been flagging? can we have been flagging? can you have been flagging? can they have been flagging?

Interro-negative form

Simple form	V-ing form
can I not flag? can you not flag? can he not flag? can we not flag? can you not flag? can they not flag?	can I not be flagging? can you not be flagging? can he not be flagging? can we not be flagging? can you not be flagging? can they not be flagging?
Perfect	V-ing perfect
can I not have flagged? can you not have flagged? can he not have flagged? can we not have flagged? can you not have flagged? can they not have flagged?	can I not have been flagging? can you not have been flagging? can he not have been flagging? can we not have been flagging? can you not have been flagging? can they not have been flagging?