must overfertilise
Regular verb: overfertilise - overfertilised- overfertilised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must overfertilise
you must overfertilise
he must overfertilise
we must overfertilise
you must overfertilise
they must overfertilise 	I must be overfertilising
you must be overfertilising
he must be overfertilising
we must be overfertilising
you must be overfertilising
they must be overfertilising	I must have overfertilised
you must have overfertilised
he must have overfertilised
we must have overfertilised
you must have overfertilised
they must have overfertilised	I must have been overfertilising
you must have been overfertilising
he must have been overfertilising
we must have been overfertilising
you must have been overfertilising
they must have been overfertilising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not overfertilise
you must not overfertilise
he must not overfertilise
we must not overfertilise
you must not overfertilise
they must not overfertilise 	I must not be overfertilising
you must not be overfertilising
he must not be overfertilising
we must not be overfertilising
you must not be overfertilising
they must not be overfertilising	I must not have overfertilised
you must not have overfertilised
he must not have overfertilised
we must not have overfertilised
you must not have overfertilised
they must not have overfertilised	I must not have been overfertilising
you must not have been overfertilising
he must not have been overfertilising
we must not have been overfertilising
you must not have been overfertilising
they must not have been overfertilising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I overfertilise?
must you overfertilise?
must he overfertilise?
must we overfertilise?
must you overfertilise?
must they overfertilise? 	must I be overfertilising?
must you be overfertilising?
must he be overfertilising?
must we be overfertilising?
must you be overfertilising?
must they be overfertilising? 	must I have overfertilised?
must you have overfertilised?
must he have overfertilised?
must we have overfertilised?
must you have overfertilised?
must they have overfertilised? 	must I have been overfertilising?
must you have been overfertilising?
must he have been overfertilising?
must we have been overfertilising?
must you have been overfertilising?
must they have been overfertilising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not overfertilise?
must you not overfertilise?
must he not overfertilise?
must we not overfertilise?
must you not overfertilise?
must they not overfertilise? 	must I not be overfertilising?
must you not be overfertilising?
must he not be overfertilising?
must we not be overfertilising?
must you not be overfertilising?
must they not be overfertilising? 	must I not have overfertilised?
must you not have overfertilised?
must he not have overfertilised?
must we not have overfertilised?
must you not have overfertilised?
must they not have overfertilised? 	must I not have been overfertilising?
must you not have been overfertilising?
must he not have been overfertilising?
must we not have been overfertilising?
must you not have been overfertilising?
must they not have been overfertilising?