could strive
Verbo irregular: strive - strived- striven

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could strive
you could strive
he could strive
we could strive
you could strive
they could strive 	I could be striving
you could be striving
he could be striving
we could be striving
you could be striving
they could be striving	I could have striven
you could have striven
he could have striven
we could have striven
you could have striven
they could have striven	I could have been striving
you could have been striving
he could have been striving
we could have been striving
you could have been striving
they could have been striving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not strive
you could not strive
he could not strive
we could not strive
you could not strive
they could not strive 	I could not be striving
you could not be striving
he could not be striving
we could not be striving
you could not be striving
they could not be striving	I could not have striven
you could not have striven
he could not have striven
we could not have striven
you could not have striven
they could not have striven	I could not have been striving
you could not have been striving
he could not have been striving
we could not have been striving
you could not have been striving
they could not have been striving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I strive?
could you strive?
could he strive?
could we strive?
could you strive?
could they strive? 	could I be striving?
could you be striving?
could he be striving?
could we be striving?
could you be striving?
could they be striving? 	could I have striven?
could you have striven?
could he have striven?
could we have striven?
could you have striven?
could they have striven? 	could I have been striving?
could you have been striving?
could he have been striving?
could we have been striving?
could you have been striving?
could they have been striving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not strive?
could you not strive?
could he not strive?
could we not strive?
could you not strive?
could they not strive? 	could I not be striving?
could you not be striving?
could he not be striving?
could we not be striving?
could you not be striving?
could they not be striving? 	could I not have striven?
could you not have striven?
could he not have striven?
could we not have striven?
could you not have striven?
could they not have striven? 	could I not have been striving?
could you not have been striving?
could he not have been striving?
could we not have been striving?
could you not have been striving?
could they not have been striving?