should tail
Regular verb: tail - tailed- tailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should tail
you should tail
she should tail
we should tail
you should tail
they should tail 	I should be tailing
you should be tailing
she should be tailing
we should be tailing
you should be tailing
they should be tailing	I should have tailed
you should have tailed
she should have tailed
we should have tailed
you should have tailed
they should have tailed	I should have been tailing
you should have been tailing
she should have been tailing
we should have been tailing
you should have been tailing
they should have been tailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not tail
you should not tail
she should not tail
we should not tail
you should not tail
they should not tail 	I should not be tailing
you should not be tailing
she should not be tailing
we should not be tailing
you should not be tailing
they should not be tailing	I should not have tailed
you should not have tailed
she should not have tailed
we should not have tailed
you should not have tailed
they should not have tailed	I should not have been tailing
you should not have been tailing
she should not have been tailing
we should not have been tailing
you should not have been tailing
they should not have been tailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tail?
should you tail?
should she tail?
should we tail?
should you tail?
should they tail? 	should I be tailing?
should you be tailing?
should she be tailing?
should we be tailing?
should you be tailing?
should they be tailing? 	should I have tailed?
should you have tailed?
should she have tailed?
should we have tailed?
should you have tailed?
should they have tailed? 	should I have been tailing?
should you have been tailing?
should she have been tailing?
should we have been tailing?
should you have been tailing?
should they have been tailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not tail?
should you not tail?
should she not tail?
should we not tail?
should you not tail?
should they not tail? 	should I not be tailing?
should you not be tailing?
should she not be tailing?
should we not be tailing?
should you not be tailing?
should they not be tailing? 	should I not have tailed?
should you not have tailed?
should she not have tailed?
should we not have tailed?
should you not have tailed?
should they not have tailed? 	should I not have been tailing?
should you not have been tailing?
should she not have been tailing?
should we not have been tailing?
should you not have been tailing?
should they not have been tailing?