could fun
Regular verb: fun - funed- funed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fun
you could fun
he could fun
we could fun
you could fun
they could fun 	I could be funing
you could be funing
he could be funing
we could be funing
you could be funing
they could be funing	I could have funed
you could have funed
he could have funed
we could have funed
you could have funed
they could have funed	I could have been funing
you could have been funing
he could have been funing
we could have been funing
you could have been funing
they could have been funing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fun
you couldn't fun
he couldn't fun
we couldn't fun
you couldn't fun
they couldn't fun 	I couldn't be funing
you couldn't be funing
he couldn't be funing
we couldn't be funing
you couldn't be funing
they couldn't be funing	I couldn't have funed
you couldn't have funed
he couldn't have funed
we couldn't have funed
you couldn't have funed
they couldn't have funed	I couldn't have been funing
you couldn't have been funing
he couldn't have been funing
we couldn't have been funing
you couldn't have been funing
they couldn't have been funing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fun?
could you fun?
could he fun?
could we fun?
could you fun?
could they fun? 	could I be funing?
could you be funing?
could he be funing?
could we be funing?
could you be funing?
could they be funing? 	could I have funed?
could you have funed?
could he have funed?
could we have funed?
could you have funed?
could they have funed? 	could I have been funing?
could you have been funing?
could he have been funing?
could we have been funing?
could you have been funing?
could they have been funing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fun?
couldn't you fun?
couldn't he fun?
couldn't we fun?
couldn't you fun?
couldn't they fun? 	couldn't I be funing?
couldn't you be funing?
couldn't he be funing?
couldn't we be funing?
couldn't you be funing?
couldn't they be funing? 	couldn't I have funed?
couldn't you have funed?
couldn't he have funed?
couldn't we have funed?
couldn't you have funed?
couldn't they have funed? 	couldn't I have been funing?
couldn't you have been funing?
couldn't he have been funing?
couldn't we have been funing?
couldn't you have been funing?
couldn't they have been funing?