shall strengthen
Regular verb: strengthen - strengthened- strengthened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll strengthen
you'll strengthen
she'll strengthen
we'll strengthen
you'll strengthen
they'll strengthen 	I'll be strengthening
you'll be strengthening
she'll be strengthening
we'll be strengthening
you'll be strengthening
they'll be strengthening	I'll have strengthened
you'll have strengthened
she'll have strengthened
we'll have strengthened
you'll have strengthened
they'll have strengthened	I'll have been strengthening
you'll have been strengthening
she'll have been strengthening
we'll have been strengthening
you'll have been strengthening
they'll have been strengthening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't strengthen
you shan't strengthen
she shan't strengthen
we shan't strengthen
you shan't strengthen
they shan't strengthen 	I shan't be strengthening
you shan't be strengthening
she shan't be strengthening
we shan't be strengthening
you shan't be strengthening
they shan't be strengthening	I shan't have strengthened
you shan't have strengthened
she shan't have strengthened
we shan't have strengthened
you shan't have strengthened
they shan't have strengthened	I shan't have been strengthening
you shan't have been strengthening
she shan't have been strengthening
we shan't have been strengthening
you shan't have been strengthening
they shan't have been strengthening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I strengthen?
shall you strengthen?
shall she strengthen?
shall we strengthen?
shall you strengthen?
shall they strengthen? 	shall I be strengthening?
shall you be strengthening?
shall she be strengthening?
shall we be strengthening?
shall you be strengthening?
shall they be strengthening? 	shall I have strengthened?
shall you have strengthened?
shall she have strengthened?
shall we have strengthened?
shall you have strengthened?
shall they have strengthened? 	shall I have been strengthening?
shall you have been strengthening?
shall she have been strengthening?
shall we have been strengthening?
shall you have been strengthening?
shall they have been strengthening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I strengthen?
shan't you strengthen?
shan't she strengthen?
shan't we strengthen?
shan't you strengthen?
shan't they strengthen? 	shan't I be strengthening?
shan't you be strengthening?
shan't she be strengthening?
shan't we be strengthening?
shan't you be strengthening?
shan't they be strengthening? 	shan't I have strengthened?
shan't you have strengthened?
shan't she have strengthened?
shan't we have strengthened?
shan't you have strengthened?
shan't they have strengthened? 	shan't I have been strengthening?
shan't you have been strengthening?
shan't she have been strengthening?
shan't we have been strengthening?
shan't you have been strengthening?
shan't they have been strengthening?