must retest
Regular verb: retest - retested- retested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must retest
you must retest
she must retest
we must retest
you must retest
they must retest 	I must be retesting
you must be retesting
she must be retesting
we must be retesting
you must be retesting
they must be retesting	I must have retested
you must have retested
she must have retested
we must have retested
you must have retested
they must have retested	I must have been retesting
you must have been retesting
she must have been retesting
we must have been retesting
you must have been retesting
they must have been retesting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not retest
you must not retest
she must not retest
we must not retest
you must not retest
they must not retest 	I must not be retesting
you must not be retesting
she must not be retesting
we must not be retesting
you must not be retesting
they must not be retesting	I must not have retested
you must not have retested
she must not have retested
we must not have retested
you must not have retested
they must not have retested	I must not have been retesting
you must not have been retesting
she must not have been retesting
we must not have been retesting
you must not have been retesting
they must not have been retesting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I retest?
must you retest?
must she retest?
must we retest?
must you retest?
must they retest? 	must I be retesting?
must you be retesting?
must she be retesting?
must we be retesting?
must you be retesting?
must they be retesting? 	must I have retested?
must you have retested?
must she have retested?
must we have retested?
must you have retested?
must they have retested? 	must I have been retesting?
must you have been retesting?
must she have been retesting?
must we have been retesting?
must you have been retesting?
must they have been retesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not retest?
must you not retest?
must she not retest?
must we not retest?
must you not retest?
must they not retest? 	must I not be retesting?
must you not be retesting?
must she not be retesting?
must we not be retesting?
must you not be retesting?
must they not be retesting? 	must I not have retested?
must you not have retested?
must she not have retested?
must we not have retested?
must you not have retested?
must they not have retested? 	must I not have been retesting?
must you not have been retesting?
must she not have been retesting?
must we not have been retesting?
must you not have been retesting?
must they not have been retesting?