must cave
Verbe régulier : cave - caved- caved
Traduction française : faire de la spéléologie 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must cave
you must cave
she must cave
we must cave
you must cave
they must cave 	I must be caving
you must be caving
she must be caving
we must be caving
you must be caving
they must be caving	I must have caved
you must have caved
she must have caved
we must have caved
you must have caved
they must have caved	I must have been caving
you must have been caving
she must have been caving
we must have been caving
you must have been caving
they must have been caving	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not cave
you must not cave
she must not cave
we must not cave
you must not cave
they must not cave 	I must not be caving
you must not be caving
she must not be caving
we must not be caving
you must not be caving
they must not be caving	I must not have caved
you must not have caved
she must not have caved
we must not have caved
you must not have caved
they must not have caved	I must not have been caving
you must not have been caving
she must not have been caving
we must not have been caving
you must not have been caving
they must not have been caving	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I cave?
must you cave?
must she cave?
must we cave?
must you cave?
must they cave? 	must I be caving?
must you be caving?
must she be caving?
must we be caving?
must you be caving?
must they be caving? 	must I have caved?
must you have caved?
must she have caved?
must we have caved?
must you have caved?
must they have caved? 	must I have been caving?
must you have been caving?
must she have been caving?
must we have been caving?
must you have been caving?
must they have been caving? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not cave?
must you not cave?
must she not cave?
must we not cave?
must you not cave?
must they not cave? 	must I not be caving?
must you not be caving?
must she not be caving?
must we not be caving?
must you not be caving?
must they not be caving? 	must I not have caved?
must you not have caved?
must she not have caved?
must we not have caved?
must you not have caved?
must they not have caved? 	must I not have been caving?
must you not have been caving?
must she not have been caving?
must we not have been caving?
must you not have been caving?
must they not have been caving?