must precool
Verbo regular: precool - precooled- precooled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must precool
you must precool
he must precool
we must precool
you must precool
they must precool 	I must be precooling
you must be precooling
he must be precooling
we must be precooling
you must be precooling
they must be precooling	I must have precooled
you must have precooled
he must have precooled
we must have precooled
you must have precooled
they must have precooled	I must have been precooling
you must have been precooling
he must have been precooling
we must have been precooling
you must have been precooling
they must have been precooling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not precool
you must not precool
he must not precool
we must not precool
you must not precool
they must not precool 	I must not be precooling
you must not be precooling
he must not be precooling
we must not be precooling
you must not be precooling
they must not be precooling	I must not have precooled
you must not have precooled
he must not have precooled
we must not have precooled
you must not have precooled
they must not have precooled	I must not have been precooling
you must not have been precooling
he must not have been precooling
we must not have been precooling
you must not have been precooling
they must not have been precooling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I precool?
must you precool?
must he precool?
must we precool?
must you precool?
must they precool? 	must I be precooling?
must you be precooling?
must he be precooling?
must we be precooling?
must you be precooling?
must they be precooling? 	must I have precooled?
must you have precooled?
must he have precooled?
must we have precooled?
must you have precooled?
must they have precooled? 	must I have been precooling?
must you have been precooling?
must he have been precooling?
must we have been precooling?
must you have been precooling?
must they have been precooling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not precool?
must you not precool?
must he not precool?
must we not precool?
must you not precool?
must they not precool? 	must I not be precooling?
must you not be precooling?
must he not be precooling?
must we not be precooling?
must you not be precooling?
must they not be precooling? 	must I not have precooled?
must you not have precooled?
must he not have precooled?
must we not have precooled?
must you not have precooled?
must they not have precooled? 	must I not have been precooling?
must you not have been precooling?
must he not have been precooling?
must we not have been precooling?
must you not have been precooling?
must they not have been precooling?