English verb conjugation
CAN LEAF

Regular verb: leaf - leafed - leafed

Affirmation

Simple form	V-ing form
I can leaf you can leaf he can leaf we can leaf you can leaf they can leaf	I can be leafing you can be leafing he can be leafing we can be leafing you can be leafing they can be leafing
Perfect	V-ing perfect
I can have leafed you can have leafed he can have leafed we can have leafed you can have leafed they can have leafed	I can have been leafing you can have been leafing he can have been leafing we can have been leafing you can have been leafing they can have been leafing

Negation

Simple form	V-ing form
I can't leaf you can't leaf he can't leaf we can't leaf you can't leaf they can't leaf	I can't be leafing you can't be leafing he can't be leafing we can't be leafing you can't be leafing they can't be leafing
Perfect	V-ing perfect
I can't have leafed you can't have leafed he can't have leafed we can't have leafed you can't have leafed they can't have leafed	I can't have been leafing you can't have been leafing he can't have been leafing we can't have been leafing you can't have been leafing they can't have been leafing

Interrogative form

Simple form	V-ing form
can I leaf? can you leaf? can he leaf? can we leaf? can you leaf? can they leaf?	can I be leafing? can you be leafing? can he be leafing? can we be leafing? can you be leafing? can they be leafing?
Perfect	V-ing perfect
can I have leafed? can you have leafed? can he have leafed? can we have leafed? can you have leafed? can they have leafed?	can I have been leafing? can you have been leafing? can he have been leafing? can we have been leafing? can you have been leafing? can they have been leafing?

Interro-negative form

Simple form	V-ing form
can't I leaf? can't you leaf? can't he leaf? can't we leaf? can't you leaf? can't they leaf?	can't I be leafing? can't you be leafing? can't he be leafing? can't we be leafing? can't you be leafing? can't they be leafing?
Perfect	V-ing perfect
can't I have leafed? can't you have leafed? can't he have leafed? can't we have leafed? can't you have leafed? can't they have leafed?	can't I have been leafing? can't you have been leafing? can't he have been leafing? can't we have been leafing? can't you have been leafing? can't they have been leafing?