English verb conjugation
CAN FIFE

Regular verb: fife - fifed - fifed

Affirmation

Simple form	V-ing form
I can fife you can fife he can fife we can fife you can fife they can fife	I can be fifing you can be fifing he can be fifing we can be fifing you can be fifing they can be fifing
Perfect	V-ing perfect
I can have fifed you can have fifed he can have fifed we can have fifed you can have fifed they can have fifed	I can have been fifing you can have been fifing he can have been fifing we can have been fifing you can have been fifing they can have been fifing

Negation

Simple form	V-ing form
I cannot fife you cannot fife he cannot fife we cannot fife you cannot fife they cannot fife	I cannot be fifing you cannot be fifing he cannot be fifing we cannot be fifing you cannot be fifing they cannot be fifing
Perfect	V-ing perfect
I cannot have fifed you cannot have fifed he cannot have fifed we cannot have fifed you cannot have fifed they cannot have fifed	I cannot have been fifing you cannot have been fifing he cannot have been fifing we cannot have been fifing you cannot have been fifing they cannot have been fifing

Interrogative form

Simple form	V-ing form
can I fife? can you fife? can he fife? can we fife? can you fife? can they fife?	can I be fifing? can you be fifing? can he be fifing? can we be fifing? can you be fifing? can they be fifing?
Perfect	V-ing perfect
can I have fifed? can you have fifed? can he have fifed? can we have fifed? can you have fifed? can they have fifed?	can I have been fifing? can you have been fifing? can he have been fifing? can we have been fifing? can you have been fifing? can they have been fifing?

Interro-negative form

Simple form	V-ing form
can I not fife? can you not fife? can he not fife? can we not fife? can you not fife? can they not fife?	can I not be fifing? can you not be fifing? can he not be fifing? can we not be fifing? can you not be fifing? can they not be fifing?
Perfect	V-ing perfect
can I not have fifed? can you not have fifed? can he not have fifed? can we not have fifed? can you not have fifed? can they not have fifed?	can I not have been fifing? can you not have been fifing? can he not have been fifing? can we not have been fifing? can you not have been fifing? can they not have been fifing?