English verb conjugation
CAN GREEN

Regular verb: green - greened - greened

Affirmation

Simple form	V-ing form
I can green you can green she can green we can green you can green they can green	I can be greening you can be greening she can be greening we can be greening you can be greening they can be greening
Perfect	V-ing perfect
I can have greened you can have greened she can have greened we can have greened you can have greened they can have greened	I can have been greening you can have been greening she can have been greening we can have been greening you can have been greening they can have been greening

Negation

Simple form	V-ing form
I can't green you can't green she can't green we can't green you can't green they can't green	I can't be greening you can't be greening she can't be greening we can't be greening you can't be greening they can't be greening
Perfect	V-ing perfect
I can't have greened you can't have greened she can't have greened we can't have greened you can't have greened they can't have greened	I can't have been greening you can't have been greening she can't have been greening we can't have been greening you can't have been greening they can't have been greening

Interrogative form

Simple form	V-ing form
can I green? can you green? can she green? can we green? can you green? can they green?	can I be greening? can you be greening? can she be greening? can we be greening? can you be greening? can they be greening?
Perfect	V-ing perfect
can I have greened? can you have greened? can she have greened? can we have greened? can you have greened? can they have greened?	can I have been greening? can you have been greening? can she have been greening? can we have been greening? can you have been greening? can they have been greening?

Interro-negative form

Simple form	V-ing form
can't I green? can't you green? can't she green? can't we green? can't you green? can't they green?	can't I be greening? can't you be greening? can't she be greening? can't we be greening? can't you be greening? can't they be greening?
Perfect	V-ing perfect
can't I have greened? can't you have greened? can't she have greened? can't we have greened? can't you have greened? can't they have greened?	can't I have been greening? can't you have been greening? can't she have been greening? can't we have been greening? can't you have been greening? can't they have been greening?