must deduce
Regular verb: deduce - deduced- deduced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must deduce
you must deduce
she must deduce
we must deduce
you must deduce
they must deduce 	I must be deducing
you must be deducing
she must be deducing
we must be deducing
you must be deducing
they must be deducing	I must have deduced
you must have deduced
she must have deduced
we must have deduced
you must have deduced
they must have deduced	I must have been deducing
you must have been deducing
she must have been deducing
we must have been deducing
you must have been deducing
they must have been deducing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not deduce
you must not deduce
she must not deduce
we must not deduce
you must not deduce
they must not deduce 	I must not be deducing
you must not be deducing
she must not be deducing
we must not be deducing
you must not be deducing
they must not be deducing	I must not have deduced
you must not have deduced
she must not have deduced
we must not have deduced
you must not have deduced
they must not have deduced	I must not have been deducing
you must not have been deducing
she must not have been deducing
we must not have been deducing
you must not have been deducing
they must not have been deducing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I deduce?
must you deduce?
must she deduce?
must we deduce?
must you deduce?
must they deduce? 	must I be deducing?
must you be deducing?
must she be deducing?
must we be deducing?
must you be deducing?
must they be deducing? 	must I have deduced?
must you have deduced?
must she have deduced?
must we have deduced?
must you have deduced?
must they have deduced? 	must I have been deducing?
must you have been deducing?
must she have been deducing?
must we have been deducing?
must you have been deducing?
must they have been deducing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not deduce?
must you not deduce?
must she not deduce?
must we not deduce?
must you not deduce?
must they not deduce? 	must I not be deducing?
must you not be deducing?
must she not be deducing?
must we not be deducing?
must you not be deducing?
must they not be deducing? 	must I not have deduced?
must you not have deduced?
must she not have deduced?
must we not have deduced?
must you not have deduced?
must they not have deduced? 	must I not have been deducing?
must you not have been deducing?
must she not have been deducing?
must we not have been deducing?
must you not have been deducing?
must they not have been deducing?