English verb conjugation
CAN FORM

Regular verb: form - formed - formed

Affirmation

Simple form	V-ing form
I can form you can form he can form we can form you can form they can form	I can be forming you can be forming he can be forming we can be forming you can be forming they can be forming
Perfect	V-ing perfect
I can have formed you can have formed he can have formed we can have formed you can have formed they can have formed	I can have been forming you can have been forming he can have been forming we can have been forming you can have been forming they can have been forming

Negation

Simple form	V-ing form
I can't form you can't form he can't form we can't form you can't form they can't form	I can't be forming you can't be forming he can't be forming we can't be forming you can't be forming they can't be forming
Perfect	V-ing perfect
I can't have formed you can't have formed he can't have formed we can't have formed you can't have formed they can't have formed	I can't have been forming you can't have been forming he can't have been forming we can't have been forming you can't have been forming they can't have been forming

Interrogative form

Simple form	V-ing form
can I form? can you form? can he form? can we form? can you form? can they form?	can I be forming? can you be forming? can he be forming? can we be forming? can you be forming? can they be forming?
Perfect	V-ing perfect
can I have formed? can you have formed? can he have formed? can we have formed? can you have formed? can they have formed?	can I have been forming? can you have been forming? can he have been forming? can we have been forming? can you have been forming? can they have been forming?

Interro-negative form

Simple form	V-ing form
can't I form? can't you form? can't he form? can't we form? can't you form? can't they form?	can't I be forming? can't you be forming? can't he be forming? can't we be forming? can't you be forming? can't they be forming?
Perfect	V-ing perfect
can't I have formed? can't you have formed? can't he have formed? can't we have formed? can't you have formed? can't they have formed?	can't I have been forming? can't you have been forming? can't he have been forming? can't we have been forming? can't you have been forming? can't they have been forming?