can extend
Verbo regular: extend - extended- extended

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can extend
you can extend
she can extend
we can extend
you can extend
they can extend 	I can be extending
you can be extending
she can be extending
we can be extending
you can be extending
they can be extending	I can have extended
you can have extended
she can have extended
we can have extended
you can have extended
they can have extended	I can have been extending
you can have been extending
she can have been extending
we can have been extending
you can have been extending
they can have been extending	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't extend
you can't extend
she can't extend
we can't extend
you can't extend
they can't extend 	I can't be extending
you can't be extending
she can't be extending
we can't be extending
you can't be extending
they can't be extending	I can't have extended
you can't have extended
she can't have extended
we can't have extended
you can't have extended
they can't have extended	I can't have been extending
you can't have been extending
she can't have been extending
we can't have been extending
you can't have been extending
they can't have been extending	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I extend?
can you extend?
can she extend?
can we extend?
can you extend?
can they extend? 	can I be extending?
can you be extending?
can she be extending?
can we be extending?
can you be extending?
can they be extending? 	can I have extended?
can you have extended?
can she have extended?
can we have extended?
can you have extended?
can they have extended? 	can I have been extending?
can you have been extending?
can she have been extending?
can we have been extending?
can you have been extending?
can they have been extending? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I extend?
can't you extend?
can't she extend?
can't we extend?
can't you extend?
can't they extend? 	can't I be extending?
can't you be extending?
can't she be extending?
can't we be extending?
can't you be extending?
can't they be extending? 	can't I have extended?
can't you have extended?
can't she have extended?
can't we have extended?
can't you have extended?
can't they have extended? 	can't I have been extending?
can't you have been extending?
can't she have been extending?
can't we have been extending?
can't you have been extending?
can't they have been extending?