English verb conjugation
COULD ENCYST

Regular verb: encyst - encysted - encysted

Affirmation

Simple form	V-ing form
I could encyst you could encyst he could encyst we could encyst you could encyst they could encyst	I could be encysting you could be encysting he could be encysting we could be encysting you could be encysting they could be encysting
Perfect	V-ing perfect
I could have encysted you could have encysted he could have encysted we could have encysted you could have encysted they could have encysted	I could have been encysting you could have been encysting he could have been encysting we could have been encysting you could have been encysting they could have been encysting

Negation

Simple form	V-ing form
I couldn't encyst you couldn't encyst he couldn't encyst we couldn't encyst you couldn't encyst they couldn't encyst	I couldn't be encysting you couldn't be encysting he couldn't be encysting we couldn't be encysting you couldn't be encysting they couldn't be encysting
Perfect	V-ing perfect
I couldn't have encysted you couldn't have encysted he couldn't have encysted we couldn't have encysted you couldn't have encysted they couldn't have encysted	I couldn't have been encysting you couldn't have been encysting he couldn't have been encysting we couldn't have been encysting you couldn't have been encysting they couldn't have been encysting

Interrogative form

Simple form	V-ing form
could I encyst? could you encyst? could he encyst? could we encyst? could you encyst? could they encyst?	could I be encysting? could you be encysting? could he be encysting? could we be encysting? could you be encysting? could they be encysting?
Perfect	V-ing perfect
could I have encysted? could you have encysted? could he have encysted? could we have encysted? could you have encysted? could they have encysted?	could I have been encysting? could you have been encysting? could he have been encysting? could we have been encysting? could you have been encysting? could they have been encysting?

Interro-negative form

Simple form	V-ing form
couldn't I encyst? couldn't you encyst? couldn't he encyst? couldn't we encyst? couldn't you encyst? couldn't they encyst?	couldn't I be encysting? couldn't you be encysting? couldn't he be encysting? couldn't we be encysting? couldn't you be encysting? couldn't they be encysting?
Perfect	V-ing perfect
couldn't I have encysted? couldn't you have encysted? couldn't he have encysted? couldn't we have encysted? couldn't you have encysted? couldn't they have encysted?	couldn't I have been encysting? couldn't you have been encysting? couldn't he have been encysting? couldn't we have been encysting? couldn't you have been encysting? couldn't they have been encysting?