can pretreat
Regular verb: pretreat - pretreated- pretreated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can pretreat
you can pretreat
he can pretreat
we can pretreat
you can pretreat
they can pretreat 	I can be pretreating
you can be pretreating
he can be pretreating
we can be pretreating
you can be pretreating
they can be pretreating	I can have pretreated
you can have pretreated
he can have pretreated
we can have pretreated
you can have pretreated
they can have pretreated	I can have been pretreating
you can have been pretreating
he can have been pretreating
we can have been pretreating
you can have been pretreating
they can have been pretreating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot pretreat
you cannot pretreat
he cannot pretreat
we cannot pretreat
you cannot pretreat
they cannot pretreat 	I cannot be pretreating
you cannot be pretreating
he cannot be pretreating
we cannot be pretreating
you cannot be pretreating
they cannot be pretreating	I cannot have pretreated
you cannot have pretreated
he cannot have pretreated
we cannot have pretreated
you cannot have pretreated
they cannot have pretreated	I cannot have been pretreating
you cannot have been pretreating
he cannot have been pretreating
we cannot have been pretreating
you cannot have been pretreating
they cannot have been pretreating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I pretreat?
can you pretreat?
can he pretreat?
can we pretreat?
can you pretreat?
can they pretreat? 	can I be pretreating?
can you be pretreating?
can he be pretreating?
can we be pretreating?
can you be pretreating?
can they be pretreating? 	can I have pretreated?
can you have pretreated?
can he have pretreated?
can we have pretreated?
can you have pretreated?
can they have pretreated? 	can I have been pretreating?
can you have been pretreating?
can he have been pretreating?
can we have been pretreating?
can you have been pretreating?
can they have been pretreating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not pretreat?
can you not pretreat?
can he not pretreat?
can we not pretreat?
can you not pretreat?
can they not pretreat? 	can I not be pretreating?
can you not be pretreating?
can he not be pretreating?
can we not be pretreating?
can you not be pretreating?
can they not be pretreating? 	can I not have pretreated?
can you not have pretreated?
can he not have pretreated?
can we not have pretreated?
can you not have pretreated?
can they not have pretreated? 	can I not have been pretreating?
can you not have been pretreating?
can he not have been pretreating?
can we not have been pretreating?
can you not have been pretreating?
can they not have been pretreating?