English verb conjugation
COULD FUN

Regular verb: fun - funed - funed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?