could preestablish
Regular verb: preestablish - preestablished- preestablished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preestablish
you could preestablish
he could preestablish
we could preestablish
you could preestablish
they could preestablish 	I could be preestablishing
you could be preestablishing
he could be preestablishing
we could be preestablishing
you could be preestablishing
they could be preestablishing	I could have preestablished
you could have preestablished
he could have preestablished
we could have preestablished
you could have preestablished
they could have preestablished	I could have been preestablishing
you could have been preestablishing
he could have been preestablishing
we could have been preestablishing
you could have been preestablishing
they could have been preestablishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't preestablish
you couldn't preestablish
he couldn't preestablish
we couldn't preestablish
you couldn't preestablish
they couldn't preestablish 	I couldn't be preestablishing
you couldn't be preestablishing
he couldn't be preestablishing
we couldn't be preestablishing
you couldn't be preestablishing
they couldn't be preestablishing	I couldn't have preestablished
you couldn't have preestablished
he couldn't have preestablished
we couldn't have preestablished
you couldn't have preestablished
they couldn't have preestablished	I couldn't have been preestablishing
you couldn't have been preestablishing
he couldn't have been preestablishing
we couldn't have been preestablishing
you couldn't have been preestablishing
they couldn't have been preestablishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preestablish?
could you preestablish?
could he preestablish?
could we preestablish?
could you preestablish?
could they preestablish? 	could I be preestablishing?
could you be preestablishing?
could he be preestablishing?
could we be preestablishing?
could you be preestablishing?
could they be preestablishing? 	could I have preestablished?
could you have preestablished?
could he have preestablished?
could we have preestablished?
could you have preestablished?
could they have preestablished? 	could I have been preestablishing?
could you have been preestablishing?
could he have been preestablishing?
could we have been preestablishing?
could you have been preestablishing?
could they have been preestablishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I preestablish?
couldn't you preestablish?
couldn't he preestablish?
couldn't we preestablish?
couldn't you preestablish?
couldn't they preestablish? 	couldn't I be preestablishing?
couldn't you be preestablishing?
couldn't he be preestablishing?
couldn't we be preestablishing?
couldn't you be preestablishing?
couldn't they be preestablishing? 	couldn't I have preestablished?
couldn't you have preestablished?
couldn't he have preestablished?
couldn't we have preestablished?
couldn't you have preestablished?
couldn't they have preestablished? 	couldn't I have been preestablishing?
couldn't you have been preestablishing?
couldn't he have been preestablishing?
couldn't we have been preestablishing?
couldn't you have been preestablishing?
couldn't they have been preestablishing?