should trail
Verbo regular: trail - trailed- trailed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should trail
you should trail
she should trail
we should trail
you should trail
they should trail 	I should be trailing
you should be trailing
she should be trailing
we should be trailing
you should be trailing
they should be trailing	I should have trailed
you should have trailed
she should have trailed
we should have trailed
you should have trailed
they should have trailed	I should have been trailing
you should have been trailing
she should have been trailing
we should have been trailing
you should have been trailing
they should have been trailing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not trail
you should not trail
she should not trail
we should not trail
you should not trail
they should not trail 	I should not be trailing
you should not be trailing
she should not be trailing
we should not be trailing
you should not be trailing
they should not be trailing	I should not have trailed
you should not have trailed
she should not have trailed
we should not have trailed
you should not have trailed
they should not have trailed	I should not have been trailing
you should not have been trailing
she should not have been trailing
we should not have been trailing
you should not have been trailing
they should not have been trailing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I trail?
should you trail?
should she trail?
should we trail?
should you trail?
should they trail? 	should I be trailing?
should you be trailing?
should she be trailing?
should we be trailing?
should you be trailing?
should they be trailing? 	should I have trailed?
should you have trailed?
should she have trailed?
should we have trailed?
should you have trailed?
should they have trailed? 	should I have been trailing?
should you have been trailing?
should she have been trailing?
should we have been trailing?
should you have been trailing?
should they have been trailing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not trail?
should you not trail?
should she not trail?
should we not trail?
should you not trail?
should they not trail? 	should I not be trailing?
should you not be trailing?
should she not be trailing?
should we not be trailing?
should you not be trailing?
should they not be trailing? 	should I not have trailed?
should you not have trailed?
should she not have trailed?
should we not have trailed?
should you not have trailed?
should they not have trailed? 	should I not have been trailing?
should you not have been trailing?
should she not have been trailing?
should we not have been trailing?
should you not have been trailing?
should they not have been trailing?