must quibble
Verbo regular: quibble - quibbled- quibbled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must quibble
you must quibble
she must quibble
we must quibble
you must quibble
they must quibble 	I must be quibbling
you must be quibbling
she must be quibbling
we must be quibbling
you must be quibbling
they must be quibbling	I must have quibbled
you must have quibbled
she must have quibbled
we must have quibbled
you must have quibbled
they must have quibbled	I must have been quibbling
you must have been quibbling
she must have been quibbling
we must have been quibbling
you must have been quibbling
they must have been quibbling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not quibble
you must not quibble
she must not quibble
we must not quibble
you must not quibble
they must not quibble 	I must not be quibbling
you must not be quibbling
she must not be quibbling
we must not be quibbling
you must not be quibbling
they must not be quibbling	I must not have quibbled
you must not have quibbled
she must not have quibbled
we must not have quibbled
you must not have quibbled
they must not have quibbled	I must not have been quibbling
you must not have been quibbling
she must not have been quibbling
we must not have been quibbling
you must not have been quibbling
they must not have been quibbling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I quibble?
must you quibble?
must she quibble?
must we quibble?
must you quibble?
must they quibble? 	must I be quibbling?
must you be quibbling?
must she be quibbling?
must we be quibbling?
must you be quibbling?
must they be quibbling? 	must I have quibbled?
must you have quibbled?
must she have quibbled?
must we have quibbled?
must you have quibbled?
must they have quibbled? 	must I have been quibbling?
must you have been quibbling?
must she have been quibbling?
must we have been quibbling?
must you have been quibbling?
must they have been quibbling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not quibble?
must you not quibble?
must she not quibble?
must we not quibble?
must you not quibble?
must they not quibble? 	must I not be quibbling?
must you not be quibbling?
must she not be quibbling?
must we not be quibbling?
must you not be quibbling?
must they not be quibbling? 	must I not have quibbled?
must you not have quibbled?
must she not have quibbled?
must we not have quibbled?
must you not have quibbled?
must they not have quibbled? 	must I not have been quibbling?
must you not have been quibbling?
must she not have been quibbling?
must we not have been quibbling?
must you not have been quibbling?
must they not have been quibbling?