English verb conjugation
CAN CHIRRUP

Regular verb: chirrup - chirruped - chirruped

Affirmation

Simple form	V-ing form
I can chirrup you can chirrup she can chirrup we can chirrup you can chirrup they can chirrup	I can be chirruping you can be chirruping she can be chirruping we can be chirruping you can be chirruping they can be chirruping
Perfect	V-ing perfect
I can have chirruped you can have chirruped she can have chirruped we can have chirruped you can have chirruped they can have chirruped	I can have been chirruping you can have been chirruping she can have been chirruping we can have been chirruping you can have been chirruping they can have been chirruping

Negation

Simple form	V-ing form
I can't chirrup you can't chirrup she can't chirrup we can't chirrup you can't chirrup they can't chirrup	I can't be chirruping you can't be chirruping she can't be chirruping we can't be chirruping you can't be chirruping they can't be chirruping
Perfect	V-ing perfect
I can't have chirruped you can't have chirruped she can't have chirruped we can't have chirruped you can't have chirruped they can't have chirruped	I can't have been chirruping you can't have been chirruping she can't have been chirruping we can't have been chirruping you can't have been chirruping they can't have been chirruping

Interrogative form

Simple form	V-ing form
can I chirrup? can you chirrup? can she chirrup? can we chirrup? can you chirrup? can they chirrup?	can I be chirruping? can you be chirruping? can she be chirruping? can we be chirruping? can you be chirruping? can they be chirruping?
Perfect	V-ing perfect
can I have chirruped? can you have chirruped? can she have chirruped? can we have chirruped? can you have chirruped? can they have chirruped?	can I have been chirruping? can you have been chirruping? can she have been chirruping? can we have been chirruping? can you have been chirruping? can they have been chirruping?

Interro-negative form

Simple form	V-ing form
can't I chirrup? can't you chirrup? can't she chirrup? can't we chirrup? can't you chirrup? can't they chirrup?	can't I be chirruping? can't you be chirruping? can't she be chirruping? can't we be chirruping? can't you be chirruping? can't they be chirruping?
Perfect	V-ing perfect
can't I have chirruped? can't you have chirruped? can't she have chirruped? can't we have chirruped? can't you have chirruped? can't they have chirruped?	can't I have been chirruping? can't you have been chirruping? can't she have been chirruping? can't we have been chirruping? can't you have been chirruping? can't they have been chirruping?