must disinfest
Regular verb: disinfest - disinfested- disinfested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must disinfest
you must disinfest
he must disinfest
we must disinfest
you must disinfest
they must disinfest 	I must be disinfesting
you must be disinfesting
he must be disinfesting
we must be disinfesting
you must be disinfesting
they must be disinfesting	I must have disinfested
you must have disinfested
he must have disinfested
we must have disinfested
you must have disinfested
they must have disinfested	I must have been disinfesting
you must have been disinfesting
he must have been disinfesting
we must have been disinfesting
you must have been disinfesting
they must have been disinfesting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not disinfest
you must not disinfest
he must not disinfest
we must not disinfest
you must not disinfest
they must not disinfest 	I must not be disinfesting
you must not be disinfesting
he must not be disinfesting
we must not be disinfesting
you must not be disinfesting
they must not be disinfesting	I must not have disinfested
you must not have disinfested
he must not have disinfested
we must not have disinfested
you must not have disinfested
they must not have disinfested	I must not have been disinfesting
you must not have been disinfesting
he must not have been disinfesting
we must not have been disinfesting
you must not have been disinfesting
they must not have been disinfesting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I disinfest?
must you disinfest?
must he disinfest?
must we disinfest?
must you disinfest?
must they disinfest? 	must I be disinfesting?
must you be disinfesting?
must he be disinfesting?
must we be disinfesting?
must you be disinfesting?
must they be disinfesting? 	must I have disinfested?
must you have disinfested?
must he have disinfested?
must we have disinfested?
must you have disinfested?
must they have disinfested? 	must I have been disinfesting?
must you have been disinfesting?
must he have been disinfesting?
must we have been disinfesting?
must you have been disinfesting?
must they have been disinfesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not disinfest?
must you not disinfest?
must he not disinfest?
must we not disinfest?
must you not disinfest?
must they not disinfest? 	must I not be disinfesting?
must you not be disinfesting?
must he not be disinfesting?
must we not be disinfesting?
must you not be disinfesting?
must they not be disinfesting? 	must I not have disinfested?
must you not have disinfested?
must he not have disinfested?
must we not have disinfested?
must you not have disinfested?
must they not have disinfested? 	must I not have been disinfesting?
must you not have been disinfesting?
must he not have been disinfesting?
must we not have been disinfesting?
must you not have been disinfesting?
must they not have been disinfesting?