must defragment
Regular verb: defragment - defragmented- defragmented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must defragment
you must defragment
he must defragment
we must defragment
you must defragment
they must defragment 	I must be defragmenting
you must be defragmenting
he must be defragmenting
we must be defragmenting
you must be defragmenting
they must be defragmenting	I must have defragmented
you must have defragmented
he must have defragmented
we must have defragmented
you must have defragmented
they must have defragmented	I must have been defragmenting
you must have been defragmenting
he must have been defragmenting
we must have been defragmenting
you must have been defragmenting
they must have been defragmenting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not defragment
you must not defragment
he must not defragment
we must not defragment
you must not defragment
they must not defragment 	I must not be defragmenting
you must not be defragmenting
he must not be defragmenting
we must not be defragmenting
you must not be defragmenting
they must not be defragmenting	I must not have defragmented
you must not have defragmented
he must not have defragmented
we must not have defragmented
you must not have defragmented
they must not have defragmented	I must not have been defragmenting
you must not have been defragmenting
he must not have been defragmenting
we must not have been defragmenting
you must not have been defragmenting
they must not have been defragmenting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I defragment?
must you defragment?
must he defragment?
must we defragment?
must you defragment?
must they defragment? 	must I be defragmenting?
must you be defragmenting?
must he be defragmenting?
must we be defragmenting?
must you be defragmenting?
must they be defragmenting? 	must I have defragmented?
must you have defragmented?
must he have defragmented?
must we have defragmented?
must you have defragmented?
must they have defragmented? 	must I have been defragmenting?
must you have been defragmenting?
must he have been defragmenting?
must we have been defragmenting?
must you have been defragmenting?
must they have been defragmenting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not defragment?
must you not defragment?
must he not defragment?
must we not defragment?
must you not defragment?
must they not defragment? 	must I not be defragmenting?
must you not be defragmenting?
must he not be defragmenting?
must we not be defragmenting?
must you not be defragmenting?
must they not be defragmenting? 	must I not have defragmented?
must you not have defragmented?
must he not have defragmented?
must we not have defragmented?
must you not have defragmented?
must they not have defragmented? 	must I not have been defragmenting?
must you not have been defragmenting?
must he not have been defragmenting?
must we not have been defragmenting?
must you not have been defragmenting?
must they not have been defragmenting?