must enquire
Verbo regular: enquire - enquired- enquired

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must enquire
you must enquire
he must enquire
we must enquire
you must enquire
they must enquire 	I must be enquiring
you must be enquiring
he must be enquiring
we must be enquiring
you must be enquiring
they must be enquiring	I must have enquired
you must have enquired
he must have enquired
we must have enquired
you must have enquired
they must have enquired	I must have been enquiring
you must have been enquiring
he must have been enquiring
we must have been enquiring
you must have been enquiring
they must have been enquiring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not enquire
you must not enquire
he must not enquire
we must not enquire
you must not enquire
they must not enquire 	I must not be enquiring
you must not be enquiring
he must not be enquiring
we must not be enquiring
you must not be enquiring
they must not be enquiring	I must not have enquired
you must not have enquired
he must not have enquired
we must not have enquired
you must not have enquired
they must not have enquired	I must not have been enquiring
you must not have been enquiring
he must not have been enquiring
we must not have been enquiring
you must not have been enquiring
they must not have been enquiring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I enquire?
must you enquire?
must he enquire?
must we enquire?
must you enquire?
must they enquire? 	must I be enquiring?
must you be enquiring?
must he be enquiring?
must we be enquiring?
must you be enquiring?
must they be enquiring? 	must I have enquired?
must you have enquired?
must he have enquired?
must we have enquired?
must you have enquired?
must they have enquired? 	must I have been enquiring?
must you have been enquiring?
must he have been enquiring?
must we have been enquiring?
must you have been enquiring?
must they have been enquiring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not enquire?
must you not enquire?
must he not enquire?
must we not enquire?
must you not enquire?
must they not enquire? 	must I not be enquiring?
must you not be enquiring?
must he not be enquiring?
must we not be enquiring?
must you not be enquiring?
must they not be enquiring? 	must I not have enquired?
must you not have enquired?
must he not have enquired?
must we not have enquired?
must you not have enquired?
must they not have enquired? 	must I not have been enquiring?
must you not have been enquiring?
must he not have been enquiring?
must we not have been enquiring?
must you not have been enquiring?
must they not have been enquiring?