could preinstill
Regular verb: preinstill - preinstilled- preinstilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preinstill
you could preinstill
he could preinstill
we could preinstill
you could preinstill
they could preinstill 	I could be preinstilling
you could be preinstilling
he could be preinstilling
we could be preinstilling
you could be preinstilling
they could be preinstilling	I could have preinstilled
you could have preinstilled
he could have preinstilled
we could have preinstilled
you could have preinstilled
they could have preinstilled	I could have been preinstilling
you could have been preinstilling
he could have been preinstilling
we could have been preinstilling
you could have been preinstilling
they could have been preinstilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not preinstill
you could not preinstill
he could not preinstill
we could not preinstill
you could not preinstill
they could not preinstill 	I could not be preinstilling
you could not be preinstilling
he could not be preinstilling
we could not be preinstilling
you could not be preinstilling
they could not be preinstilling	I could not have preinstilled
you could not have preinstilled
he could not have preinstilled
we could not have preinstilled
you could not have preinstilled
they could not have preinstilled	I could not have been preinstilling
you could not have been preinstilling
he could not have been preinstilling
we could not have been preinstilling
you could not have been preinstilling
they could not have been preinstilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preinstill?
could you preinstill?
could he preinstill?
could we preinstill?
could you preinstill?
could they preinstill? 	could I be preinstilling?
could you be preinstilling?
could he be preinstilling?
could we be preinstilling?
could you be preinstilling?
could they be preinstilling? 	could I have preinstilled?
could you have preinstilled?
could he have preinstilled?
could we have preinstilled?
could you have preinstilled?
could they have preinstilled? 	could I have been preinstilling?
could you have been preinstilling?
could he have been preinstilling?
could we have been preinstilling?
could you have been preinstilling?
could they have been preinstilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not preinstill?
could you not preinstill?
could he not preinstill?
could we not preinstill?
could you not preinstill?
could they not preinstill? 	could I not be preinstilling?
could you not be preinstilling?
could he not be preinstilling?
could we not be preinstilling?
could you not be preinstilling?
could they not be preinstilling? 	could I not have preinstilled?
could you not have preinstilled?
could he not have preinstilled?
could we not have preinstilled?
could you not have preinstilled?
could they not have preinstilled? 	could I not have been preinstilling?
could you not have been preinstilling?
could he not have been preinstilling?
could we not have been preinstilling?
could you not have been preinstilling?
could they not have been preinstilling?