should extend
Verbo regular: extend - extended- extended

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd extend
you'd extend
she'd extend
we'd extend
you'd extend
they'd extend 	I'd be extending
you'd be extending
she'd be extending
we'd be extending
you'd be extending
they'd be extending	I should've extended
you should've extended
she should've extended
we should've extended
you should've extended
they should've extended	I should've been extending
you should've been extending
she should've been extending
we should've been extending
you should've been extending
they should've been extending	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't extend
you shouldn't extend
she shouldn't extend
we shouldn't extend
you shouldn't extend
they shouldn't extend 	I shouldn't be extending
you shouldn't be extending
she shouldn't be extending
we shouldn't be extending
you shouldn't be extending
they shouldn't be extending	I shouldn't have extended
you shouldn't have extended
she shouldn't have extended
we shouldn't have extended
you shouldn't have extended
they shouldn't have extended	I shouldn't have been extending
you shouldn't have been extending
she shouldn't have been extending
we shouldn't have been extending
you shouldn't have been extending
they shouldn't have been extending	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I extend?
should you extend?
should she extend?
should we extend?
should you extend?
should they extend? 	should I be extending?
should you be extending?
should she be extending?
should we be extending?
should you be extending?
should they be extending? 	should I have extended?
should you have extended?
should she have extended?
should we have extended?
should you have extended?
should they have extended? 	should I have been extending?
should you have been extending?
should she have been extending?
should we have been extending?
should you have been extending?
should they have been extending? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I extend?
shouldn't you extend?
shouldn't she extend?
shouldn't we extend?
shouldn't you extend?
shouldn't they extend? 	shouldn't I be extending?
shouldn't you be extending?
shouldn't she be extending?
shouldn't we be extending?
shouldn't you be extending?
shouldn't they be extending? 	shouldn't I have extended?
shouldn't you have extended?
shouldn't she have extended?
shouldn't we have extended?
shouldn't you have extended?
shouldn't they have extended? 	shouldn't I have been extending?
shouldn't you have been extending?
shouldn't she have been extending?
shouldn't we have been extending?
shouldn't you have been extending?
shouldn't they have been extending?