could preaccustom
Regular verb: preaccustom - preaccustomed- preaccustomed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preaccustom
you could preaccustom
he could preaccustom
we could preaccustom
you could preaccustom
they could preaccustom 	I could be preaccustoming
you could be preaccustoming
he could be preaccustoming
we could be preaccustoming
you could be preaccustoming
they could be preaccustoming	I could have preaccustomed
you could have preaccustomed
he could have preaccustomed
we could have preaccustomed
you could have preaccustomed
they could have preaccustomed	I could have been preaccustoming
you could have been preaccustoming
he could have been preaccustoming
we could have been preaccustoming
you could have been preaccustoming
they could have been preaccustoming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't preaccustom
you couldn't preaccustom
he couldn't preaccustom
we couldn't preaccustom
you couldn't preaccustom
they couldn't preaccustom 	I couldn't be preaccustoming
you couldn't be preaccustoming
he couldn't be preaccustoming
we couldn't be preaccustoming
you couldn't be preaccustoming
they couldn't be preaccustoming	I couldn't have preaccustomed
you couldn't have preaccustomed
he couldn't have preaccustomed
we couldn't have preaccustomed
you couldn't have preaccustomed
they couldn't have preaccustomed	I couldn't have been preaccustoming
you couldn't have been preaccustoming
he couldn't have been preaccustoming
we couldn't have been preaccustoming
you couldn't have been preaccustoming
they couldn't have been preaccustoming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preaccustom?
could you preaccustom?
could he preaccustom?
could we preaccustom?
could you preaccustom?
could they preaccustom? 	could I be preaccustoming?
could you be preaccustoming?
could he be preaccustoming?
could we be preaccustoming?
could you be preaccustoming?
could they be preaccustoming? 	could I have preaccustomed?
could you have preaccustomed?
could he have preaccustomed?
could we have preaccustomed?
could you have preaccustomed?
could they have preaccustomed? 	could I have been preaccustoming?
could you have been preaccustoming?
could he have been preaccustoming?
could we have been preaccustoming?
could you have been preaccustoming?
could they have been preaccustoming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I preaccustom?
couldn't you preaccustom?
couldn't he preaccustom?
couldn't we preaccustom?
couldn't you preaccustom?
couldn't they preaccustom? 	couldn't I be preaccustoming?
couldn't you be preaccustoming?
couldn't he be preaccustoming?
couldn't we be preaccustoming?
couldn't you be preaccustoming?
couldn't they be preaccustoming? 	couldn't I have preaccustomed?
couldn't you have preaccustomed?
couldn't he have preaccustomed?
couldn't we have preaccustomed?
couldn't you have preaccustomed?
couldn't they have preaccustomed? 	couldn't I have been preaccustoming?
couldn't you have been preaccustoming?
couldn't he have been preaccustoming?
couldn't we have been preaccustoming?
couldn't you have been preaccustoming?
couldn't they have been preaccustoming?