could fife
Regular verb: fife - fifed- fifed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fife
you could fife
she could fife
we could fife
you could fife
they could fife 	I could be fifing
you could be fifing
she could be fifing
we could be fifing
you could be fifing
they could be fifing	I could have fifed
you could have fifed
she could have fifed
we could have fifed
you could have fifed
they could have fifed	I could have been fifing
you could have been fifing
she could have been fifing
we could have been fifing
you could have been fifing
they could have been fifing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fife
you couldn't fife
she couldn't fife
we couldn't fife
you couldn't fife
they couldn't fife 	I couldn't be fifing
you couldn't be fifing
she couldn't be fifing
we couldn't be fifing
you couldn't be fifing
they couldn't be fifing	I couldn't have fifed
you couldn't have fifed
she couldn't have fifed
we couldn't have fifed
you couldn't have fifed
they couldn't have fifed	I couldn't have been fifing
you couldn't have been fifing
she couldn't have been fifing
we couldn't have been fifing
you couldn't have been fifing
they couldn't have been fifing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fife?
could you fife?
could she fife?
could we fife?
could you fife?
could they fife? 	could I be fifing?
could you be fifing?
could she be fifing?
could we be fifing?
could you be fifing?
could they be fifing? 	could I have fifed?
could you have fifed?
could she have fifed?
could we have fifed?
could you have fifed?
could they have fifed? 	could I have been fifing?
could you have been fifing?
could she have been fifing?
could we have been fifing?
could you have been fifing?
could they have been fifing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fife?
couldn't you fife?
couldn't she fife?
couldn't we fife?
couldn't you fife?
couldn't they fife? 	couldn't I be fifing?
couldn't you be fifing?
couldn't she be fifing?
couldn't we be fifing?
couldn't you be fifing?
couldn't they be fifing? 	couldn't I have fifed?
couldn't you have fifed?
couldn't she have fifed?
couldn't we have fifed?
couldn't you have fifed?
couldn't they have fifed? 	couldn't I have been fifing?
couldn't you have been fifing?
couldn't she have been fifing?
couldn't we have been fifing?
couldn't you have been fifing?
couldn't they have been fifing?