English verb conjugation
CAN FUN

Regular verb: fun - funed - funed

Affirmation

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

Negation

Simple form	V-ing form
I cannot fun you cannot fun he cannot fun we cannot fun you cannot fun they cannot fun	I cannot be funing you cannot be funing he cannot be funing we cannot be funing you cannot be funing they cannot be funing
Perfect	V-ing perfect
I cannot have funed you cannot have funed he cannot have funed we cannot have funed you cannot have funed they cannot have funed	I cannot have been funing you cannot have been funing he cannot have been funing we cannot have been funing you cannot have been funing they cannot have been funing

Interrogative form

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

Interro-negative form

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