should sap
Regular verb: sap - sapped- sapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should sap
you should sap
she should sap
we should sap
you should sap
they should sap 	I should be sapping
you should be sapping
she should be sapping
we should be sapping
you should be sapping
they should be sapping	I should have sapped
you should have sapped
she should have sapped
we should have sapped
you should have sapped
they should have sapped	I should have been sapping
you should have been sapping
she should have been sapping
we should have been sapping
you should have been sapping
they should have been sapping	

Negation 	
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I should not sap
you should not sap
she should not sap
we should not sap
you should not sap
they should not sap 	I should not be sapping
you should not be sapping
she should not be sapping
we should not be sapping
you should not be sapping
they should not be sapping	I should not have sapped
you should not have sapped
she should not have sapped
we should not have sapped
you should not have sapped
they should not have sapped	I should not have been sapping
you should not have been sapping
she should not have been sapping
we should not have been sapping
you should not have been sapping
they should not have been sapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I sap?
should you sap?
should she sap?
should we sap?
should you sap?
should they sap? 	should I be sapping?
should you be sapping?
should she be sapping?
should we be sapping?
should you be sapping?
should they be sapping? 	should I have sapped?
should you have sapped?
should she have sapped?
should we have sapped?
should you have sapped?
should they have sapped? 	should I have been sapping?
should you have been sapping?
should she have been sapping?
should we have been sapping?
should you have been sapping?
should they have been sapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not sap?
should you not sap?
should she not sap?
should we not sap?
should you not sap?
should they not sap? 	should I not be sapping?
should you not be sapping?
should she not be sapping?
should we not be sapping?
should you not be sapping?
should they not be sapping? 	should I not have sapped?
should you not have sapped?
should she not have sapped?
should we not have sapped?
should you not have sapped?
should they not have sapped? 	should I not have been sapping?
should you not have been sapping?
should she not have been sapping?
should we not have been sapping?
should you not have been sapping?
should they not have been sapping?