must crackle
Verbe régulier : crackle - crackled- crackled
Traduction française : craquer - craqueler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must crackle
you must crackle
he must crackle
we must crackle
you must crackle
they must crackle 	I must be crackling
you must be crackling
he must be crackling
we must be crackling
you must be crackling
they must be crackling	I must have crackled
you must have crackled
he must have crackled
we must have crackled
you must have crackled
they must have crackled	I must have been crackling
you must have been crackling
he must have been crackling
we must have been crackling
you must have been crackling
they must have been crackling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not crackle
you must not crackle
he must not crackle
we must not crackle
you must not crackle
they must not crackle 	I must not be crackling
you must not be crackling
he must not be crackling
we must not be crackling
you must not be crackling
they must not be crackling	I must not have crackled
you must not have crackled
he must not have crackled
we must not have crackled
you must not have crackled
they must not have crackled	I must not have been crackling
you must not have been crackling
he must not have been crackling
we must not have been crackling
you must not have been crackling
they must not have been crackling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I crackle?
must you crackle?
must he crackle?
must we crackle?
must you crackle?
must they crackle? 	must I be crackling?
must you be crackling?
must he be crackling?
must we be crackling?
must you be crackling?
must they be crackling? 	must I have crackled?
must you have crackled?
must he have crackled?
must we have crackled?
must you have crackled?
must they have crackled? 	must I have been crackling?
must you have been crackling?
must he have been crackling?
must we have been crackling?
must you have been crackling?
must they have been crackling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not crackle?
must you not crackle?
must he not crackle?
must we not crackle?
must you not crackle?
must they not crackle? 	must I not be crackling?
must you not be crackling?
must he not be crackling?
must we not be crackling?
must you not be crackling?
must they not be crackling? 	must I not have crackled?
must you not have crackled?
must he not have crackled?
must we not have crackled?
must you not have crackled?
must they not have crackled? 	must I not have been crackling?
must you not have been crackling?
must he not have been crackling?
must we not have been crackling?
must you not have been crackling?
must they not have been crackling?