I can saw you can saw she can saw we can saw you can saw they can saw
V-ing form
I can be sawing you can be sawing she can be sawing we can be sawing you can be sawing they can be sawing
Perfect
I can have sawed, sawn you can have sawed, sawn she can have sawed, sawn we can have sawed, sawn you can have sawed, sawn they can have sawed, sawn
V-ing perfect
I can have been sawing you can have been sawing she can have been sawing we can have been sawing you can have been sawing they can have been sawing
Negation
Simple form
I cannot saw you cannot saw she cannot saw we cannot saw you cannot saw they cannot saw
V-ing form
I cannot be sawing you cannot be sawing she cannot be sawing we cannot be sawing you cannot be sawing they cannot be sawing
Perfect
I cannot have sawed, sawn you cannot have sawed, sawn she cannot have sawed, sawn we cannot have sawed, sawn you cannot have sawed, sawn they cannot have sawed, sawn
V-ing perfect
I cannot have been sawing you cannot have been sawing she cannot have been sawing we cannot have been sawing you cannot have been sawing they cannot have been sawing
Interrogative form
Simple form
can I saw? can you saw? can she saw? can we saw? can you saw? can they saw?
V-ing form
can I be sawing? can you be sawing? can she be sawing? can we be sawing? can you be sawing? can they be sawing?
Perfect
can I have sawed, sawn? can you have sawed, sawn? can she have sawed, sawn? can we have sawed, sawn? can you have sawed, sawn? can they have sawed, sawn?
V-ing perfect
can I have been sawing? can you have been sawing? can she have been sawing? can we have been sawing? can you have been sawing? can they have been sawing?
Interro-negative form
Simple form
can I not saw? can you not saw? can she not saw? can we not saw? can you not saw? can they not saw?
V-ing form
can I not be sawing? can you not be sawing? can she not be sawing? can we not be sawing? can you not be sawing? can they not be sawing?
Perfect
can I not have sawed, sawn? can you not have sawed, sawn? can she not have sawed, sawn? can we not have sawed, sawn? can you not have sawed, sawn? can they not have sawed, sawn?
V-ing perfect
can I not have been sawing? can you not have been sawing? can she not have been sawing? can we not have been sawing? can you not have been sawing? can they not have been sawing?