could foist
Regular verb: foist - foisted- foisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could foist
you could foist
he could foist
we could foist
you could foist
they could foist 	I could be foisting
you could be foisting
he could be foisting
we could be foisting
you could be foisting
they could be foisting	I could have foisted
you could have foisted
he could have foisted
we could have foisted
you could have foisted
they could have foisted	I could have been foisting
you could have been foisting
he could have been foisting
we could have been foisting
you could have been foisting
they could have been foisting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't foist
you couldn't foist
he couldn't foist
we couldn't foist
you couldn't foist
they couldn't foist 	I couldn't be foisting
you couldn't be foisting
he couldn't be foisting
we couldn't be foisting
you couldn't be foisting
they couldn't be foisting	I couldn't have foisted
you couldn't have foisted
he couldn't have foisted
we couldn't have foisted
you couldn't have foisted
they couldn't have foisted	I couldn't have been foisting
you couldn't have been foisting
he couldn't have been foisting
we couldn't have been foisting
you couldn't have been foisting
they couldn't have been foisting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I foist?
could you foist?
could he foist?
could we foist?
could you foist?
could they foist? 	could I be foisting?
could you be foisting?
could he be foisting?
could we be foisting?
could you be foisting?
could they be foisting? 	could I have foisted?
could you have foisted?
could he have foisted?
could we have foisted?
could you have foisted?
could they have foisted? 	could I have been foisting?
could you have been foisting?
could he have been foisting?
could we have been foisting?
could you have been foisting?
could they have been foisting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I foist?
couldn't you foist?
couldn't he foist?
couldn't we foist?
couldn't you foist?
couldn't they foist? 	couldn't I be foisting?
couldn't you be foisting?
couldn't he be foisting?
couldn't we be foisting?
couldn't you be foisting?
couldn't they be foisting? 	couldn't I have foisted?
couldn't you have foisted?
couldn't he have foisted?
couldn't we have foisted?
couldn't you have foisted?
couldn't they have foisted? 	couldn't I have been foisting?
couldn't you have been foisting?
couldn't he have been foisting?
couldn't we have been foisting?
couldn't you have been foisting?
couldn't they have been foisting?