English verb conjugation
COULD PREINSTILL

Regular verb: preinstill - preinstilled - preinstilled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?