must cross-multiply
Verbe régulier : cross-multiply - cross-multiplied- cross-multiplied

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must cross-multiply
you must cross-multiply
he must cross-multiply
we must cross-multiply
you must cross-multiply
they must cross-multiply 	I must be cross-multiplying
you must be cross-multiplying
he must be cross-multiplying
we must be cross-multiplying
you must be cross-multiplying
they must be cross-multiplying	I must have cross-multiplied
you must have cross-multiplied
he must have cross-multiplied
we must have cross-multiplied
you must have cross-multiplied
they must have cross-multiplied	I must have been cross-multiplying
you must have been cross-multiplying
he must have been cross-multiplying
we must have been cross-multiplying
you must have been cross-multiplying
they must have been cross-multiplying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't cross-multiply
you mustn't cross-multiply
he mustn't cross-multiply
we mustn't cross-multiply
you mustn't cross-multiply
they mustn't cross-multiply 	I mustn't be cross-multiplying
you mustn't be cross-multiplying
he mustn't be cross-multiplying
we mustn't be cross-multiplying
you mustn't be cross-multiplying
they mustn't be cross-multiplying	I mustn't have cross-multiplied
you mustn't have cross-multiplied
he mustn't have cross-multiplied
we mustn't have cross-multiplied
you mustn't have cross-multiplied
they mustn't have cross-multiplied	I mustn't have been cross-multiplying
you mustn't have been cross-multiplying
he mustn't have been cross-multiplying
we mustn't have been cross-multiplying
you mustn't have been cross-multiplying
they mustn't have been cross-multiplying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I cross-multiply?
must you cross-multiply?
must he cross-multiply?
must we cross-multiply?
must you cross-multiply?
must they cross-multiply? 	must I be cross-multiplying?
must you be cross-multiplying?
must he be cross-multiplying?
must we be cross-multiplying?
must you be cross-multiplying?
must they be cross-multiplying? 	must I have cross-multiplied?
must you have cross-multiplied?
must he have cross-multiplied?
must we have cross-multiplied?
must you have cross-multiplied?
must they have cross-multiplied? 	must I have been cross-multiplying?
must you have been cross-multiplying?
must he have been cross-multiplying?
must we have been cross-multiplying?
must you have been cross-multiplying?
must they have been cross-multiplying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I cross-multiply?
mustn't you cross-multiply?
mustn't he cross-multiply?
mustn't we cross-multiply?
mustn't you cross-multiply?
mustn't they cross-multiply? 	mustn't I be cross-multiplying?
mustn't you be cross-multiplying?
mustn't he be cross-multiplying?
mustn't we be cross-multiplying?
mustn't you be cross-multiplying?
mustn't they be cross-multiplying? 	mustn't I have cross-multiplied?
mustn't you have cross-multiplied?
mustn't he have cross-multiplied?
mustn't we have cross-multiplied?
mustn't you have cross-multiplied?
mustn't they have cross-multiplied? 	mustn't I have been cross-multiplying?
mustn't you have been cross-multiplying?
mustn't he have been cross-multiplying?
mustn't we have been cross-multiplying?
mustn't you have been cross-multiplying?
mustn't they have been cross-multiplying?