should titter
Verbo regular: titter - tittered- tittered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should titter
you should titter
she should titter
we should titter
you should titter
they should titter 	I should be tittering
you should be tittering
she should be tittering
we should be tittering
you should be tittering
they should be tittering	I should have tittered
you should have tittered
she should have tittered
we should have tittered
you should have tittered
they should have tittered	I should have been tittering
you should have been tittering
she should have been tittering
we should have been tittering
you should have been tittering
they should have been tittering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not titter
you should not titter
she should not titter
we should not titter
you should not titter
they should not titter 	I should not be tittering
you should not be tittering
she should not be tittering
we should not be tittering
you should not be tittering
they should not be tittering	I should not have tittered
you should not have tittered
she should not have tittered
we should not have tittered
you should not have tittered
they should not have tittered	I should not have been tittering
you should not have been tittering
she should not have been tittering
we should not have been tittering
you should not have been tittering
they should not have been tittering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I titter?
should you titter?
should she titter?
should we titter?
should you titter?
should they titter? 	should I be tittering?
should you be tittering?
should she be tittering?
should we be tittering?
should you be tittering?
should they be tittering? 	should I have tittered?
should you have tittered?
should she have tittered?
should we have tittered?
should you have tittered?
should they have tittered? 	should I have been tittering?
should you have been tittering?
should she have been tittering?
should we have been tittering?
should you have been tittering?
should they have been tittering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not titter?
should you not titter?
should she not titter?
should we not titter?
should you not titter?
should they not titter? 	should I not be tittering?
should you not be tittering?
should she not be tittering?
should we not be tittering?
should you not be tittering?
should they not be tittering? 	should I not have tittered?
should you not have tittered?
should she not have tittered?
should we not have tittered?
should you not have tittered?
should they not have tittered? 	should I not have been tittering?
should you not have been tittering?
should she not have been tittering?
should we not have been tittering?
should you not have been tittering?
should they not have been tittering?