can yackety-yak
Regular verb: yackety-yak - yackety-yaked- yackety-yaked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can yackety-yak
you can yackety-yak
he can yackety-yak
we can yackety-yak
you can yackety-yak
they can yackety-yak 	I can be yackety-yaking
you can be yackety-yaking
he can be yackety-yaking
we can be yackety-yaking
you can be yackety-yaking
they can be yackety-yaking	I can have yackety-yaked
you can have yackety-yaked
he can have yackety-yaked
we can have yackety-yaked
you can have yackety-yaked
they can have yackety-yaked	I can have been yackety-yaking
you can have been yackety-yaking
he can have been yackety-yaking
we can have been yackety-yaking
you can have been yackety-yaking
they can have been yackety-yaking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't yackety-yak
you can't yackety-yak
he can't yackety-yak
we can't yackety-yak
you can't yackety-yak
they can't yackety-yak 	I can't be yackety-yaking
you can't be yackety-yaking
he can't be yackety-yaking
we can't be yackety-yaking
you can't be yackety-yaking
they can't be yackety-yaking	I can't have yackety-yaked
you can't have yackety-yaked
he can't have yackety-yaked
we can't have yackety-yaked
you can't have yackety-yaked
they can't have yackety-yaked	I can't have been yackety-yaking
you can't have been yackety-yaking
he can't have been yackety-yaking
we can't have been yackety-yaking
you can't have been yackety-yaking
they can't have been yackety-yaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I yackety-yak?
can you yackety-yak?
can he yackety-yak?
can we yackety-yak?
can you yackety-yak?
can they yackety-yak? 	can I be yackety-yaking?
can you be yackety-yaking?
can he be yackety-yaking?
can we be yackety-yaking?
can you be yackety-yaking?
can they be yackety-yaking? 	can I have yackety-yaked?
can you have yackety-yaked?
can he have yackety-yaked?
can we have yackety-yaked?
can you have yackety-yaked?
can they have yackety-yaked? 	can I have been yackety-yaking?
can you have been yackety-yaking?
can he have been yackety-yaking?
can we have been yackety-yaking?
can you have been yackety-yaking?
can they have been yackety-yaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I yackety-yak?
can't you yackety-yak?
can't he yackety-yak?
can't we yackety-yak?
can't you yackety-yak?
can't they yackety-yak? 	can't I be yackety-yaking?
can't you be yackety-yaking?
can't he be yackety-yaking?
can't we be yackety-yaking?
can't you be yackety-yaking?
can't they be yackety-yaking? 	can't I have yackety-yaked?
can't you have yackety-yaked?
can't he have yackety-yaked?
can't we have yackety-yaked?
can't you have yackety-yaked?
can't they have yackety-yaked? 	can't I have been yackety-yaking?
can't you have been yackety-yaking?
can't he have been yackety-yaking?
can't we have been yackety-yaking?
can't you have been yackety-yaking?
can't they have been yackety-yaking?