should straighten
Regular verb: straighten - straightened- straightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should straighten
you should straighten
he should straighten
we should straighten
you should straighten
they should straighten 	I should be straightening
you should be straightening
he should be straightening
we should be straightening
you should be straightening
they should be straightening	I should have straightened
you should have straightened
he should have straightened
we should have straightened
you should have straightened
they should have straightened	I should have been straightening
you should have been straightening
he should have been straightening
we should have been straightening
you should have been straightening
they should have been straightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not straighten
you should not straighten
he should not straighten
we should not straighten
you should not straighten
they should not straighten 	I should not be straightening
you should not be straightening
he should not be straightening
we should not be straightening
you should not be straightening
they should not be straightening	I should not have straightened
you should not have straightened
he should not have straightened
we should not have straightened
you should not have straightened
they should not have straightened	I should not have been straightening
you should not have been straightening
he should not have been straightening
we should not have been straightening
you should not have been straightening
they should not have been straightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I straighten?
should you straighten?
should he straighten?
should we straighten?
should you straighten?
should they straighten? 	should I be straightening?
should you be straightening?
should he be straightening?
should we be straightening?
should you be straightening?
should they be straightening? 	should I have straightened?
should you have straightened?
should he have straightened?
should we have straightened?
should you have straightened?
should they have straightened? 	should I have been straightening?
should you have been straightening?
should he have been straightening?
should we have been straightening?
should you have been straightening?
should they have been straightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not straighten?
should you not straighten?
should he not straighten?
should we not straighten?
should you not straighten?
should they not straighten? 	should I not be straightening?
should you not be straightening?
should he not be straightening?
should we not be straightening?
should you not be straightening?
should they not be straightening? 	should I not have straightened?
should you not have straightened?
should he not have straightened?
should we not have straightened?
should you not have straightened?
should they not have straightened? 	should I not have been straightening?
should you not have been straightening?
should he not have been straightening?
should we not have been straightening?
should you not have been straightening?
should they not have been straightening?