shall witness
Regular verb: witness - witnessed- witnessed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll witness
you'll witness
she'll witness
we'll witness
you'll witness
they'll witness 	I'll be witnessing
you'll be witnessing
she'll be witnessing
we'll be witnessing
you'll be witnessing
they'll be witnessing	I'll have witnessed
you'll have witnessed
she'll have witnessed
we'll have witnessed
you'll have witnessed
they'll have witnessed	I'll have been witnessing
you'll have been witnessing
she'll have been witnessing
we'll have been witnessing
you'll have been witnessing
they'll have been witnessing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't witness
you shan't witness
she shan't witness
we shan't witness
you shan't witness
they shan't witness 	I shan't be witnessing
you shan't be witnessing
she shan't be witnessing
we shan't be witnessing
you shan't be witnessing
they shan't be witnessing	I shan't have witnessed
you shan't have witnessed
she shan't have witnessed
we shan't have witnessed
you shan't have witnessed
they shan't have witnessed	I shan't have been witnessing
you shan't have been witnessing
she shan't have been witnessing
we shan't have been witnessing
you shan't have been witnessing
they shan't have been witnessing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I witness?
shall you witness?
shall she witness?
shall we witness?
shall you witness?
shall they witness? 	shall I be witnessing?
shall you be witnessing?
shall she be witnessing?
shall we be witnessing?
shall you be witnessing?
shall they be witnessing? 	shall I have witnessed?
shall you have witnessed?
shall she have witnessed?
shall we have witnessed?
shall you have witnessed?
shall they have witnessed? 	shall I have been witnessing?
shall you have been witnessing?
shall she have been witnessing?
shall we have been witnessing?
shall you have been witnessing?
shall they have been witnessing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I witness?
shan't you witness?
shan't she witness?
shan't we witness?
shan't you witness?
shan't they witness? 	shan't I be witnessing?
shan't you be witnessing?
shan't she be witnessing?
shan't we be witnessing?
shan't you be witnessing?
shan't they be witnessing? 	shan't I have witnessed?
shan't you have witnessed?
shan't she have witnessed?
shan't we have witnessed?
shan't you have witnessed?
shan't they have witnessed? 	shan't I have been witnessing?
shan't you have been witnessing?
shan't she have been witnessing?
shan't we have been witnessing?
shan't you have been witnessing?
shan't they have been witnessing?