English verb conjugation
CAN YAMMER

Regular verb: yammer - yammered - yammered

Affirmation

Simple form	V-ing form
I can yammer you can yammer he can yammer we can yammer you can yammer they can yammer	I can be yammering you can be yammering he can be yammering we can be yammering you can be yammering they can be yammering
Perfect	V-ing perfect
I can have yammered you can have yammered he can have yammered we can have yammered you can have yammered they can have yammered	I can have been yammering you can have been yammering he can have been yammering we can have been yammering you can have been yammering they can have been yammering

Negation

Simple form	V-ing form
I can't yammer you can't yammer he can't yammer we can't yammer you can't yammer they can't yammer	I can't be yammering you can't be yammering he can't be yammering we can't be yammering you can't be yammering they can't be yammering
Perfect	V-ing perfect
I can't have yammered you can't have yammered he can't have yammered we can't have yammered you can't have yammered they can't have yammered	I can't have been yammering you can't have been yammering he can't have been yammering we can't have been yammering you can't have been yammering they can't have been yammering

Interrogative form

Simple form	V-ing form
can I yammer? can you yammer? can he yammer? can we yammer? can you yammer? can they yammer?	can I be yammering? can you be yammering? can he be yammering? can we be yammering? can you be yammering? can they be yammering?
Perfect	V-ing perfect
can I have yammered? can you have yammered? can he have yammered? can we have yammered? can you have yammered? can they have yammered?	can I have been yammering? can you have been yammering? can he have been yammering? can we have been yammering? can you have been yammering? can they have been yammering?

Interro-negative form

Simple form	V-ing form
can't I yammer? can't you yammer? can't he yammer? can't we yammer? can't you yammer? can't they yammer?	can't I be yammering? can't you be yammering? can't he be yammering? can't we be yammering? can't you be yammering? can't they be yammering?
Perfect	V-ing perfect
can't I have yammered? can't you have yammered? can't he have yammered? can't we have yammered? can't you have yammered? can't they have yammered?	can't I have been yammering? can't you have been yammering? can't he have been yammering? can't we have been yammering? can't you have been yammering? can't they have been yammering?