must cross-fertilise
Verbe régulier : cross-fertilise - cross-fertilised- cross-fertilised
Traduction française : (UK) croiser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must cross-fertilise
you must cross-fertilise
she must cross-fertilise
we must cross-fertilise
you must cross-fertilise
they must cross-fertilise 	I must be cross-fertilising
you must be cross-fertilising
she must be cross-fertilising
we must be cross-fertilising
you must be cross-fertilising
they must be cross-fertilising	I must have cross-fertilised
you must have cross-fertilised
she must have cross-fertilised
we must have cross-fertilised
you must have cross-fertilised
they must have cross-fertilised	I must have been cross-fertilising
you must have been cross-fertilising
she must have been cross-fertilising
we must have been cross-fertilising
you must have been cross-fertilising
they must have been cross-fertilising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't cross-fertilise
you mustn't cross-fertilise
she mustn't cross-fertilise
we mustn't cross-fertilise
you mustn't cross-fertilise
they mustn't cross-fertilise 	I mustn't be cross-fertilising
you mustn't be cross-fertilising
she mustn't be cross-fertilising
we mustn't be cross-fertilising
you mustn't be cross-fertilising
they mustn't be cross-fertilising	I mustn't have cross-fertilised
you mustn't have cross-fertilised
she mustn't have cross-fertilised
we mustn't have cross-fertilised
you mustn't have cross-fertilised
they mustn't have cross-fertilised	I mustn't have been cross-fertilising
you mustn't have been cross-fertilising
she mustn't have been cross-fertilising
we mustn't have been cross-fertilising
you mustn't have been cross-fertilising
they mustn't have been cross-fertilising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I cross-fertilise?
must you cross-fertilise?
must she cross-fertilise?
must we cross-fertilise?
must you cross-fertilise?
must they cross-fertilise? 	must I be cross-fertilising?
must you be cross-fertilising?
must she be cross-fertilising?
must we be cross-fertilising?
must you be cross-fertilising?
must they be cross-fertilising? 	must I have cross-fertilised?
must you have cross-fertilised?
must she have cross-fertilised?
must we have cross-fertilised?
must you have cross-fertilised?
must they have cross-fertilised? 	must I have been cross-fertilising?
must you have been cross-fertilising?
must she have been cross-fertilising?
must we have been cross-fertilising?
must you have been cross-fertilising?
must they have been cross-fertilising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I cross-fertilise?
mustn't you cross-fertilise?
mustn't she cross-fertilise?
mustn't we cross-fertilise?
mustn't you cross-fertilise?
mustn't they cross-fertilise? 	mustn't I be cross-fertilising?
mustn't you be cross-fertilising?
mustn't she be cross-fertilising?
mustn't we be cross-fertilising?
mustn't you be cross-fertilising?
mustn't they be cross-fertilising? 	mustn't I have cross-fertilised?
mustn't you have cross-fertilised?
mustn't she have cross-fertilised?
mustn't we have cross-fertilised?
mustn't you have cross-fertilised?
mustn't they have cross-fertilised? 	mustn't I have been cross-fertilising?
mustn't you have been cross-fertilising?
mustn't she have been cross-fertilising?
mustn't we have been cross-fertilising?
mustn't you have been cross-fertilising?
mustn't they have been cross-fertilising?