must reproduce
Regular verb: reproduce - reproduced- reproduced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must reproduce
you must reproduce
she must reproduce
we must reproduce
you must reproduce
they must reproduce 	I must be reproducing
you must be reproducing
she must be reproducing
we must be reproducing
you must be reproducing
they must be reproducing	I must have reproduced
you must have reproduced
she must have reproduced
we must have reproduced
you must have reproduced
they must have reproduced	I must have been reproducing
you must have been reproducing
she must have been reproducing
we must have been reproducing
you must have been reproducing
they must have been reproducing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not reproduce
you must not reproduce
she must not reproduce
we must not reproduce
you must not reproduce
they must not reproduce 	I must not be reproducing
you must not be reproducing
she must not be reproducing
we must not be reproducing
you must not be reproducing
they must not be reproducing	I must not have reproduced
you must not have reproduced
she must not have reproduced
we must not have reproduced
you must not have reproduced
they must not have reproduced	I must not have been reproducing
you must not have been reproducing
she must not have been reproducing
we must not have been reproducing
you must not have been reproducing
they must not have been reproducing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I reproduce?
must you reproduce?
must she reproduce?
must we reproduce?
must you reproduce?
must they reproduce? 	must I be reproducing?
must you be reproducing?
must she be reproducing?
must we be reproducing?
must you be reproducing?
must they be reproducing? 	must I have reproduced?
must you have reproduced?
must she have reproduced?
must we have reproduced?
must you have reproduced?
must they have reproduced? 	must I have been reproducing?
must you have been reproducing?
must she have been reproducing?
must we have been reproducing?
must you have been reproducing?
must they have been reproducing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not reproduce?
must you not reproduce?
must she not reproduce?
must we not reproduce?
must you not reproduce?
must they not reproduce? 	must I not be reproducing?
must you not be reproducing?
must she not be reproducing?
must we not be reproducing?
must you not be reproducing?
must they not be reproducing? 	must I not have reproduced?
must you not have reproduced?
must she not have reproduced?
must we not have reproduced?
must you not have reproduced?
must they not have reproduced? 	must I not have been reproducing?
must you not have been reproducing?
must she not have been reproducing?
must we not have been reproducing?
must you not have been reproducing?
must they not have been reproducing?