English verb conjugation
CAN YES

Regular verb: yes - yesed - yesed

Affirmation

Simple form	V-ing form
I can yes you can yes he can yes we can yes you can yes they can yes	I can be yesing you can be yesing he can be yesing we can be yesing you can be yesing they can be yesing
Perfect	V-ing perfect
I can have yesed you can have yesed he can have yesed we can have yesed you can have yesed they can have yesed	I can have been yesing you can have been yesing he can have been yesing we can have been yesing you can have been yesing they can have been yesing

Negation

Simple form	V-ing form
I can't yes you can't yes he can't yes we can't yes you can't yes they can't yes	I can't be yesing you can't be yesing he can't be yesing we can't be yesing you can't be yesing they can't be yesing
Perfect	V-ing perfect
I can't have yesed you can't have yesed he can't have yesed we can't have yesed you can't have yesed they can't have yesed	I can't have been yesing you can't have been yesing he can't have been yesing we can't have been yesing you can't have been yesing they can't have been yesing

Interrogative form

Simple form	V-ing form
can I yes? can you yes? can he yes? can we yes? can you yes? can they yes?	can I be yesing? can you be yesing? can he be yesing? can we be yesing? can you be yesing? can they be yesing?
Perfect	V-ing perfect
can I have yesed? can you have yesed? can he have yesed? can we have yesed? can you have yesed? can they have yesed?	can I have been yesing? can you have been yesing? can he have been yesing? can we have been yesing? can you have been yesing? can they have been yesing?

Interro-negative form

Simple form	V-ing form
can't I yes? can't you yes? can't he yes? can't we yes? can't you yes? can't they yes?	can't I be yesing? can't you be yesing? can't he be yesing? can't we be yesing? can't you be yesing? can't they be yesing?
Perfect	V-ing perfect
can't I have yesed? can't you have yesed? can't he have yesed? can't we have yesed? can't you have yesed? can't they have yesed?	can't I have been yesing? can't you have been yesing? can't he have been yesing? can't we have been yesing? can't you have been yesing? can't they have been yesing?