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 couldn't strive
you couldn't strive
he couldn't strive
we couldn't strive
you couldn't strive
they couldn't strive 	I couldn't be striving
you couldn't be striving
he couldn't be striving
we couldn't be striving
you couldn't be striving
they couldn't be striving	I couldn't have striven
you couldn't have striven
he couldn't have striven
we couldn't have striven
you couldn't have striven
they couldn't have striven	I couldn't have been striving
you couldn't have been striving
he couldn't have been striving
we couldn't have been striving
you couldn't have been striving
they couldn't 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 	
couldn't I strive?
couldn't you strive?
couldn't he strive?
couldn't we strive?
couldn't you strive?
couldn't they strive? 	couldn't I be striving?
couldn't you be striving?
couldn't he be striving?
couldn't we be striving?
couldn't you be striving?
couldn't they be striving? 	couldn't I have striven?
couldn't you have striven?
couldn't he have striven?
couldn't we have striven?
couldn't you have striven?
couldn't they have striven? 	couldn't I have been striving?
couldn't you have been striving?
couldn't he have been striving?
couldn't we have been striving?
couldn't you have been striving?
couldn't they have been striving?