shall countersign
Regular verb: countersign - countersigned- countersigned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll countersign
you'll countersign
he'll countersign
we'll countersign
you'll countersign
they'll countersign 	I'll be countersigning
you'll be countersigning
he'll be countersigning
we'll be countersigning
you'll be countersigning
they'll be countersigning	I'll have countersigned
you'll have countersigned
he'll have countersigned
we'll have countersigned
you'll have countersigned
they'll have countersigned	I'll have been countersigning
you'll have been countersigning
he'll have been countersigning
we'll have been countersigning
you'll have been countersigning
they'll have been countersigning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't countersign
you shan't countersign
he shan't countersign
we shan't countersign
you shan't countersign
they shan't countersign 	I shan't be countersigning
you shan't be countersigning
he shan't be countersigning
we shan't be countersigning
you shan't be countersigning
they shan't be countersigning	I shan't have countersigned
you shan't have countersigned
he shan't have countersigned
we shan't have countersigned
you shan't have countersigned
they shan't have countersigned	I shan't have been countersigning
you shan't have been countersigning
he shan't have been countersigning
we shan't have been countersigning
you shan't have been countersigning
they shan't have been countersigning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I countersign?
shall you countersign?
shall he countersign?
shall we countersign?
shall you countersign?
shall they countersign? 	shall I be countersigning?
shall you be countersigning?
shall he be countersigning?
shall we be countersigning?
shall you be countersigning?
shall they be countersigning? 	shall I have countersigned?
shall you have countersigned?
shall he have countersigned?
shall we have countersigned?
shall you have countersigned?
shall they have countersigned? 	shall I have been countersigning?
shall you have been countersigning?
shall he have been countersigning?
shall we have been countersigning?
shall you have been countersigning?
shall they have been countersigning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I countersign?
shan't you countersign?
shan't he countersign?
shan't we countersign?
shan't you countersign?
shan't they countersign? 	shan't I be countersigning?
shan't you be countersigning?
shan't he be countersigning?
shan't we be countersigning?
shan't you be countersigning?
shan't they be countersigning? 	shan't I have countersigned?
shan't you have countersigned?
shan't he have countersigned?
shan't we have countersigned?
shan't you have countersigned?
shan't they have countersigned? 	shan't I have been countersigning?
shan't you have been countersigning?
shan't he have been countersigning?
shan't we have been countersigning?
shan't you have been countersigning?
shan't they have been countersigning?