could aerate
Regular verb: aerate - aerated- aerated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could aerate
you could aerate
she could aerate
we could aerate
you could aerate
they could aerate 	I could be aerating
you could be aerating
she could be aerating
we could be aerating
you could be aerating
they could be aerating	I could have aerated
you could have aerated
she could have aerated
we could have aerated
you could have aerated
they could have aerated	I could have been aerating
you could have been aerating
she could have been aerating
we could have been aerating
you could have been aerating
they could have been aerating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not aerate
you could not aerate
she could not aerate
we could not aerate
you could not aerate
they could not aerate 	I could not be aerating
you could not be aerating
she could not be aerating
we could not be aerating
you could not be aerating
they could not be aerating	I could not have aerated
you could not have aerated
she could not have aerated
we could not have aerated
you could not have aerated
they could not have aerated	I could not have been aerating
you could not have been aerating
she could not have been aerating
we could not have been aerating
you could not have been aerating
they could not have been aerating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I aerate?
could you aerate?
could she aerate?
could we aerate?
could you aerate?
could they aerate? 	could I be aerating?
could you be aerating?
could she be aerating?
could we be aerating?
could you be aerating?
could they be aerating? 	could I have aerated?
could you have aerated?
could she have aerated?
could we have aerated?
could you have aerated?
could they have aerated? 	could I have been aerating?
could you have been aerating?
could she have been aerating?
could we have been aerating?
could you have been aerating?
could they have been aerating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not aerate?
could you not aerate?
could she not aerate?
could we not aerate?
could you not aerate?
could they not aerate? 	could I not be aerating?
could you not be aerating?
could she not be aerating?
could we not be aerating?
could you not be aerating?
could they not be aerating? 	could I not have aerated?
could you not have aerated?
could she not have aerated?
could we not have aerated?
could you not have aerated?
could they not have aerated? 	could I not have been aerating?
could you not have been aerating?
could she not have been aerating?
could we not have been aerating?
could you not have been aerating?
could they not have been aerating?