should mast
Regular verb: mast - masted- masted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should mast
you should mast
she should mast
we should mast
you should mast
they should mast 	I should be masting
you should be masting
she should be masting
we should be masting
you should be masting
they should be masting	I should have masted
you should have masted
she should have masted
we should have masted
you should have masted
they should have masted	I should have been masting
you should have been masting
she should have been masting
we should have been masting
you should have been masting
they should have been masting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not mast
you should not mast
she should not mast
we should not mast
you should not mast
they should not mast 	I should not be masting
you should not be masting
she should not be masting
we should not be masting
you should not be masting
they should not be masting	I should not have masted
you should not have masted
she should not have masted
we should not have masted
you should not have masted
they should not have masted	I should not have been masting
you should not have been masting
she should not have been masting
we should not have been masting
you should not have been masting
they should not have been masting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I mast?
should you mast?
should she mast?
should we mast?
should you mast?
should they mast? 	should I be masting?
should you be masting?
should she be masting?
should we be masting?
should you be masting?
should they be masting? 	should I have masted?
should you have masted?
should she have masted?
should we have masted?
should you have masted?
should they have masted? 	should I have been masting?
should you have been masting?
should she have been masting?
should we have been masting?
should you have been masting?
should they have been masting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not mast?
should you not mast?
should she not mast?
should we not mast?
should you not mast?
should they not mast? 	should I not be masting?
should you not be masting?
should she not be masting?
should we not be masting?
should you not be masting?
should they not be masting? 	should I not have masted?
should you not have masted?
should she not have masted?
should we not have masted?
should you not have masted?
should they not have masted? 	should I not have been masting?
should you not have been masting?
should she not have been masting?
should we not have been masting?
should you not have been masting?
should they not have been masting?