shall yack
Regular verb: yack - yacked- yacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll yack
you'll yack
she'll yack
we'll yack
you'll yack
they'll yack 	I'll be yacking
you'll be yacking
she'll be yacking
we'll be yacking
you'll be yacking
they'll be yacking	I'll have yacked
you'll have yacked
she'll have yacked
we'll have yacked
you'll have yacked
they'll have yacked	I'll have been yacking
you'll have been yacking
she'll have been yacking
we'll have been yacking
you'll have been yacking
they'll have been yacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't yack
you shan't yack
she shan't yack
we shan't yack
you shan't yack
they shan't yack 	I shan't be yacking
you shan't be yacking
she shan't be yacking
we shan't be yacking
you shan't be yacking
they shan't be yacking	I shan't have yacked
you shan't have yacked
she shan't have yacked
we shan't have yacked
you shan't have yacked
they shan't have yacked	I shan't have been yacking
you shan't have been yacking
she shan't have been yacking
we shan't have been yacking
you shan't have been yacking
they shan't have been yacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I yack?
shall you yack?
shall she yack?
shall we yack?
shall you yack?
shall they yack? 	shall I be yacking?
shall you be yacking?
shall she be yacking?
shall we be yacking?
shall you be yacking?
shall they be yacking? 	shall I have yacked?
shall you have yacked?
shall she have yacked?
shall we have yacked?
shall you have yacked?
shall they have yacked? 	shall I have been yacking?
shall you have been yacking?
shall she have been yacking?
shall we have been yacking?
shall you have been yacking?
shall they have been yacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I yack?
shan't you yack?
shan't she yack?
shan't we yack?
shan't you yack?
shan't they yack? 	shan't I be yacking?
shan't you be yacking?
shan't she be yacking?
shan't we be yacking?
shan't you be yacking?
shan't they be yacking? 	shan't I have yacked?
shan't you have yacked?
shan't she have yacked?
shan't we have yacked?
shan't you have yacked?
shan't they have yacked? 	shan't I have been yacking?
shan't you have been yacking?
shan't she have been yacking?
shan't we have been yacking?
shan't you have been yacking?
shan't they have been yacking?