must incubate
Verbe régulier : incubate - incubated- incubated
Traduction française : couver - être en incubation 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must incubate
you must incubate
he must incubate
we must incubate
you must incubate
they must incubate 	I must be incubating
you must be incubating
he must be incubating
we must be incubating
you must be incubating
they must be incubating	I must have incubated
you must have incubated
he must have incubated
we must have incubated
you must have incubated
they must have incubated	I must have been incubating
you must have been incubating
he must have been incubating
we must have been incubating
you must have been incubating
they must have been incubating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not incubate
you must not incubate
he must not incubate
we must not incubate
you must not incubate
they must not incubate 	I must not be incubating
you must not be incubating
he must not be incubating
we must not be incubating
you must not be incubating
they must not be incubating	I must not have incubated
you must not have incubated
he must not have incubated
we must not have incubated
you must not have incubated
they must not have incubated	I must not have been incubating
you must not have been incubating
he must not have been incubating
we must not have been incubating
you must not have been incubating
they must not have been incubating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I incubate?
must you incubate?
must he incubate?
must we incubate?
must you incubate?
must they incubate? 	must I be incubating?
must you be incubating?
must he be incubating?
must we be incubating?
must you be incubating?
must they be incubating? 	must I have incubated?
must you have incubated?
must he have incubated?
must we have incubated?
must you have incubated?
must they have incubated? 	must I have been incubating?
must you have been incubating?
must he have been incubating?
must we have been incubating?
must you have been incubating?
must they have been incubating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not incubate?
must you not incubate?
must he not incubate?
must we not incubate?
must you not incubate?
must they not incubate? 	must I not be incubating?
must you not be incubating?
must he not be incubating?
must we not be incubating?
must you not be incubating?
must they not be incubating? 	must I not have incubated?
must you not have incubated?
must he not have incubated?
must we not have incubated?
must you not have incubated?
must they not have incubated? 	must I not have been incubating?
must you not have been incubating?
must he not have been incubating?
must we not have been incubating?
must you not have been incubating?
must they not have been incubating?