must abate
Regular verb: abate - abated- abated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must abate
you must abate
he must abate
we must abate
you must abate
they must abate 	I must be abating
you must be abating
he must be abating
we must be abating
you must be abating
they must be abating	I must have abated
you must have abated
he must have abated
we must have abated
you must have abated
they must have abated	I must have been abating
you must have been abating
he must have been abating
we must have been abating
you must have been abating
they must have been abating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not abate
you must not abate
he must not abate
we must not abate
you must not abate
they must not abate 	I must not be abating
you must not be abating
he must not be abating
we must not be abating
you must not be abating
they must not be abating	I must not have abated
you must not have abated
he must not have abated
we must not have abated
you must not have abated
they must not have abated	I must not have been abating
you must not have been abating
he must not have been abating
we must not have been abating
you must not have been abating
they must not have been abating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I abate?
must you abate?
must he abate?
must we abate?
must you abate?
must they abate? 	must I be abating?
must you be abating?
must he be abating?
must we be abating?
must you be abating?
must they be abating? 	must I have abated?
must you have abated?
must he have abated?
must we have abated?
must you have abated?
must they have abated? 	must I have been abating?
must you have been abating?
must he have been abating?
must we have been abating?
must you have been abating?
must they have been abating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not abate?
must you not abate?
must he not abate?
must we not abate?
must you not abate?
must they not abate? 	must I not be abating?
must you not be abating?
must he not be abating?
must we not be abating?
must you not be abating?
must they not be abating? 	must I not have abated?
must you not have abated?
must he not have abated?
must we not have abated?
must you not have abated?
must they not have abated? 	must I not have been abating?
must you not have been abating?
must he not have been abating?
must we not have been abating?
must you not have been abating?
must they not have been abating?