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 could not fun you could not fun he could not fun we could not fun you could not fun they could not fun	I could not be funing you could not be funing he could not be funing we could not be funing you could not be funing they could not be funing
Perfect	V-ing perfect
I could not have funed you could not have funed he could not have funed we could not have funed you could not have funed they could not have funed	I could not have been funing you could not have been funing he could not have been funing we could not have been funing you could not have been funing they could not 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
could I not fun? could you not fun? could he not fun? could we not fun? could you not fun? could they not fun?	could I not be funing? could you not be funing? could he not be funing? could we not be funing? could you not be funing? could they not be funing?
Perfect	V-ing perfect
could I not have funed? could you not have funed? could he not have funed? could we not have funed? could you not have funed? could they not have funed?	could I not have been funing? could you not have been funing? could he not have been funing? could we not have been funing? could you not have been funing? could they not have been funing?