shall concentrate
Regular verb: concentrate - concentrated- concentrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll concentrate
you'll concentrate
he'll concentrate
we'll concentrate
you'll concentrate
they'll concentrate 	I'll be concentrating
you'll be concentrating
he'll be concentrating
we'll be concentrating
you'll be concentrating
they'll be concentrating	I'll have concentrated
you'll have concentrated
he'll have concentrated
we'll have concentrated
you'll have concentrated
they'll have concentrated	I'll have been concentrating
you'll have been concentrating
he'll have been concentrating
we'll have been concentrating
you'll have been concentrating
they'll have been concentrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't concentrate
you shan't concentrate
he shan't concentrate
we shan't concentrate
you shan't concentrate
they shan't concentrate 	I shan't be concentrating
you shan't be concentrating
he shan't be concentrating
we shan't be concentrating
you shan't be concentrating
they shan't be concentrating	I shan't have concentrated
you shan't have concentrated
he shan't have concentrated
we shan't have concentrated
you shan't have concentrated
they shan't have concentrated	I shan't have been concentrating
you shan't have been concentrating
he shan't have been concentrating
we shan't have been concentrating
you shan't have been concentrating
they shan't have been concentrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I concentrate?
shall you concentrate?
shall he concentrate?
shall we concentrate?
shall you concentrate?
shall they concentrate? 	shall I be concentrating?
shall you be concentrating?
shall he be concentrating?
shall we be concentrating?
shall you be concentrating?
shall they be concentrating? 	shall I have concentrated?
shall you have concentrated?
shall he have concentrated?
shall we have concentrated?
shall you have concentrated?
shall they have concentrated? 	shall I have been concentrating?
shall you have been concentrating?
shall he have been concentrating?
shall we have been concentrating?
shall you have been concentrating?
shall they have been concentrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I concentrate?
shan't you concentrate?
shan't he concentrate?
shan't we concentrate?
shan't you concentrate?
shan't they concentrate? 	shan't I be concentrating?
shan't you be concentrating?
shan't he be concentrating?
shan't we be concentrating?
shan't you be concentrating?
shan't they be concentrating? 	shan't I have concentrated?
shan't you have concentrated?
shan't he have concentrated?
shan't we have concentrated?
shan't you have concentrated?
shan't they have concentrated? 	shan't I have been concentrating?
shan't you have been concentrating?
shan't he have been concentrating?
shan't we have been concentrating?
shan't you have been concentrating?
shan't they have been concentrating?