English verb conjugation
COULD SAW

Irregular verb: saw - sawed - sawed, sawn

Affirmation

Simple form	V-ing form
I could saw you could saw he could saw we could saw you could saw they could saw	I could be sawing you could be sawing he could be sawing we could be sawing you could be sawing they could be sawing
Perfect	V-ing perfect
I could have sawed, sawn you could have sawed, sawn he could have sawed, sawn we could have sawed, sawn you could have sawed, sawn they could have sawed, sawn	I could have been sawing you could have been sawing he could have been sawing we could have been sawing you could have been sawing they could have been sawing

Negation

Simple form	V-ing form
I couldn't saw you couldn't saw he couldn't saw we couldn't saw you couldn't saw they couldn't saw	I couldn't be sawing you couldn't be sawing he couldn't be sawing we couldn't be sawing you couldn't be sawing they couldn't be sawing
Perfect	V-ing perfect
I couldn't have sawed, sawn you couldn't have sawed, sawn he couldn't have sawed, sawn we couldn't have sawed, sawn you couldn't have sawed, sawn they couldn't have sawed, sawn	I couldn't have been sawing you couldn't have been sawing he couldn't have been sawing we couldn't have been sawing you couldn't have been sawing they couldn't have been sawing

Interrogative form

Simple form	V-ing form
could I saw? could you saw? could he saw? could we saw? could you saw? could they saw?	could I be sawing? could you be sawing? could he be sawing? could we be sawing? could you be sawing? could they be sawing?
Perfect	V-ing perfect
could I have sawed, sawn? could you have sawed, sawn? could he have sawed, sawn? could we have sawed, sawn? could you have sawed, sawn? could they have sawed, sawn?	could I have been sawing? could you have been sawing? could he have been sawing? could we have been sawing? could you have been sawing? could they have been sawing?

Interro-negative form

Simple form	V-ing form
couldn't I saw? couldn't you saw? couldn't he saw? couldn't we saw? couldn't you saw? couldn't they saw?	couldn't I be sawing? couldn't you be sawing? couldn't he be sawing? couldn't we be sawing? couldn't you be sawing? couldn't they be sawing?
Perfect	V-ing perfect
couldn't I have sawed, sawn? couldn't you have sawed, sawn? couldn't he have sawed, sawn? couldn't we have sawed, sawn? couldn't you have sawed, sawn? couldn't they have sawed, sawn?	couldn't I have been sawing? couldn't you have been sawing? couldn't he have been sawing? couldn't we have been sawing? couldn't you have been sawing? couldn't they have been sawing?