must cross-fertilise
Verbo regular: cross-fertilise - cross-fertilised- cross-fertilised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must cross-fertilise
you must cross-fertilise
he 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
he 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
he 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
he must have been cross-fertilising
we must have been cross-fertilising
you must have been cross-fertilising
they must have been cross-fertilising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not cross-fertilise
you must not cross-fertilise
he must not cross-fertilise
we must not cross-fertilise
you must not cross-fertilise
they must not cross-fertilise 	I must not be cross-fertilising
you must not be cross-fertilising
he must not be cross-fertilising
we must not be cross-fertilising
you must not be cross-fertilising
they must not be cross-fertilising	I must not have cross-fertilised
you must not have cross-fertilised
he must not have cross-fertilised
we must not have cross-fertilised
you must not have cross-fertilised
they must not have cross-fertilised	I must not have been cross-fertilising
you must not have been cross-fertilising
he must not have been cross-fertilising
we must not have been cross-fertilising
you must not have been cross-fertilising
they must not have been cross-fertilising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I cross-fertilise?
must you cross-fertilise?
must he 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 he 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 he 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 he have been cross-fertilising?
must we have been cross-fertilising?
must you have been cross-fertilising?
must they have been cross-fertilising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not cross-fertilise?
must you not cross-fertilise?
must he not cross-fertilise?
must we not cross-fertilise?
must you not cross-fertilise?
must they not cross-fertilise? 	must I not be cross-fertilising?
must you not be cross-fertilising?
must he not be cross-fertilising?
must we not be cross-fertilising?
must you not be cross-fertilising?
must they not be cross-fertilising? 	must I not have cross-fertilised?
must you not have cross-fertilised?
must he not have cross-fertilised?
must we not have cross-fertilised?
must you not have cross-fertilised?
must they not have cross-fertilised? 	must I not have been cross-fertilising?
must you not have been cross-fertilising?
must he not have been cross-fertilising?
must we not have been cross-fertilising?
must you not have been cross-fertilising?
must they not have been cross-fertilising?