should pretest
Verbo regular: pretest - pretested- pretested

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd pretest
you'd pretest
he'd pretest
we'd pretest
you'd pretest
they'd pretest 	I'd be pretesting
you'd be pretesting
he'd be pretesting
we'd be pretesting
you'd be pretesting
they'd be pretesting	I should've pretested
you should've pretested
he should've pretested
we should've pretested
you should've pretested
they should've pretested	I should've been pretesting
you should've been pretesting
he should've been pretesting
we should've been pretesting
you should've been pretesting
they should've been pretesting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't pretest
you shouldn't pretest
he shouldn't pretest
we shouldn't pretest
you shouldn't pretest
they shouldn't pretest 	I shouldn't be pretesting
you shouldn't be pretesting
he shouldn't be pretesting
we shouldn't be pretesting
you shouldn't be pretesting
they shouldn't be pretesting	I shouldn't have pretested
you shouldn't have pretested
he shouldn't have pretested
we shouldn't have pretested
you shouldn't have pretested
they shouldn't have pretested	I shouldn't have been pretesting
you shouldn't have been pretesting
he shouldn't have been pretesting
we shouldn't have been pretesting
you shouldn't have been pretesting
they shouldn't have been pretesting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I pretest?
should you pretest?
should he pretest?
should we pretest?
should you pretest?
should they pretest? 	should I be pretesting?
should you be pretesting?
should he be pretesting?
should we be pretesting?
should you be pretesting?
should they be pretesting? 	should I have pretested?
should you have pretested?
should he have pretested?
should we have pretested?
should you have pretested?
should they have pretested? 	should I have been pretesting?
should you have been pretesting?
should he have been pretesting?
should we have been pretesting?
should you have been pretesting?
should they have been pretesting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I pretest?
shouldn't you pretest?
shouldn't he pretest?
shouldn't we pretest?
shouldn't you pretest?
shouldn't they pretest? 	shouldn't I be pretesting?
shouldn't you be pretesting?
shouldn't he be pretesting?
shouldn't we be pretesting?
shouldn't you be pretesting?
shouldn't they be pretesting? 	shouldn't I have pretested?
shouldn't you have pretested?
shouldn't he have pretested?
shouldn't we have pretested?
shouldn't you have pretested?
shouldn't they have pretested? 	shouldn't I have been pretesting?
shouldn't you have been pretesting?
shouldn't he have been pretesting?
shouldn't we have been pretesting?
shouldn't you have been pretesting?
shouldn't they have been pretesting?