English verb conjugation
COULD INFILL

Regular verb: infill - infilled - infilled

Affirmation

Simple form	V-ing form
I could infill you could infill he could infill we could infill you could infill they could infill	I could be infilling you could be infilling he could be infilling we could be infilling you could be infilling they could be infilling
Perfect	V-ing perfect
I could have infilled you could have infilled he could have infilled we could have infilled you could have infilled they could have infilled	I could have been infilling you could have been infilling he could have been infilling we could have been infilling you could have been infilling they could have been infilling

Negation

Simple form	V-ing form
I could not infill you could not infill he could not infill we could not infill you could not infill they could not infill	I could not be infilling you could not be infilling he could not be infilling we could not be infilling you could not be infilling they could not be infilling
Perfect	V-ing perfect
I could not have infilled you could not have infilled he could not have infilled we could not have infilled you could not have infilled they could not have infilled	I could not have been infilling you could not have been infilling he could not have been infilling we could not have been infilling you could not have been infilling they could not have been infilling

Interrogative form

Simple form	V-ing form
could I infill? could you infill? could he infill? could we infill? could you infill? could they infill?	could I be infilling? could you be infilling? could he be infilling? could we be infilling? could you be infilling? could they be infilling?
Perfect	V-ing perfect
could I have infilled? could you have infilled? could he have infilled? could we have infilled? could you have infilled? could they have infilled?	could I have been infilling? could you have been infilling? could he have been infilling? could we have been infilling? could you have been infilling? could they have been infilling?

Interro-negative form

Simple form	V-ing form
could I not infill? could you not infill? could he not infill? could we not infill? could you not infill? could they not infill?	could I not be infilling? could you not be infilling? could he not be infilling? could we not be infilling? could you not be infilling? could they not be infilling?
Perfect	V-ing perfect
could I not have infilled? could you not have infilled? could he not have infilled? could we not have infilled? could you not have infilled? could they not have infilled?	could I not have been infilling? could you not have been infilling? could he not have been infilling? could we not have been infilling? could you not have been infilling? could they not have been infilling?