should retreat
Regular verb: retreat - retreated- retreated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should retreat
you should retreat
she should retreat
we should retreat
you should retreat
they should retreat 	I should be retreating
you should be retreating
she should be retreating
we should be retreating
you should be retreating
they should be retreating	I should have retreated
you should have retreated
she should have retreated
we should have retreated
you should have retreated
they should have retreated	I should have been retreating
you should have been retreating
she should have been retreating
we should have been retreating
you should have been retreating
they should have been retreating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not retreat
you should not retreat
she should not retreat
we should not retreat
you should not retreat
they should not retreat 	I should not be retreating
you should not be retreating
she should not be retreating
we should not be retreating
you should not be retreating
they should not be retreating	I should not have retreated
you should not have retreated
she should not have retreated
we should not have retreated
you should not have retreated
they should not have retreated	I should not have been retreating
you should not have been retreating
she should not have been retreating
we should not have been retreating
you should not have been retreating
they should not have been retreating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I retreat?
should you retreat?
should she retreat?
should we retreat?
should you retreat?
should they retreat? 	should I be retreating?
should you be retreating?
should she be retreating?
should we be retreating?
should you be retreating?
should they be retreating? 	should I have retreated?
should you have retreated?
should she have retreated?
should we have retreated?
should you have retreated?
should they have retreated? 	should I have been retreating?
should you have been retreating?
should she have been retreating?
should we have been retreating?
should you have been retreating?
should they have been retreating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not retreat?
should you not retreat?
should she not retreat?
should we not retreat?
should you not retreat?
should they not retreat? 	should I not be retreating?
should you not be retreating?
should she not be retreating?
should we not be retreating?
should you not be retreating?
should they not be retreating? 	should I not have retreated?
should you not have retreated?
should she not have retreated?
should we not have retreated?
should you not have retreated?
should they not have retreated? 	should I not have been retreating?
should you not have been retreating?
should she not have been retreating?
should we not have been retreating?
should you not have been retreating?
should they not have been retreating?