must strive
Verbo irregular: strive - strived- striven

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

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

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

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