English verb conjugation
COULD REMARK

Regular verb: remark - remarked - remarked

Affirmation

Simple form	V-ing form
I could remark you could remark he could remark we could remark you could remark they could remark	I could be remarking you could be remarking he could be remarking we could be remarking you could be remarking they could be remarking
Perfect	V-ing perfect
I could have remarked you could have remarked he could have remarked we could have remarked you could have remarked they could have remarked	I could have been remarking you could have been remarking he could have been remarking we could have been remarking you could have been remarking they could have been remarking

Negation

Simple form	V-ing form
I couldn't remark you couldn't remark he couldn't remark we couldn't remark you couldn't remark they couldn't remark	I couldn't be remarking you couldn't be remarking he couldn't be remarking we couldn't be remarking you couldn't be remarking they couldn't be remarking
Perfect	V-ing perfect
I couldn't have remarked you couldn't have remarked he couldn't have remarked we couldn't have remarked you couldn't have remarked they couldn't have remarked	I couldn't have been remarking you couldn't have been remarking he couldn't have been remarking we couldn't have been remarking you couldn't have been remarking they couldn't have been remarking

Interrogative form

Simple form	V-ing form
could I remark? could you remark? could he remark? could we remark? could you remark? could they remark?	could I be remarking? could you be remarking? could he be remarking? could we be remarking? could you be remarking? could they be remarking?
Perfect	V-ing perfect
could I have remarked? could you have remarked? could he have remarked? could we have remarked? could you have remarked? could they have remarked?	could I have been remarking? could you have been remarking? could he have been remarking? could we have been remarking? could you have been remarking? could they have been remarking?

Interro-negative form

Simple form	V-ing form
couldn't I remark? couldn't you remark? couldn't he remark? couldn't we remark? couldn't you remark? couldn't they remark?	couldn't I be remarking? couldn't you be remarking? couldn't he be remarking? couldn't we be remarking? couldn't you be remarking? couldn't they be remarking?
Perfect	V-ing perfect
couldn't I have remarked? couldn't you have remarked? couldn't he have remarked? couldn't we have remarked? couldn't you have remarked? couldn't they have remarked?	couldn't I have been remarking? couldn't you have been remarking? couldn't he have been remarking? couldn't we have been remarking? couldn't you have been remarking? couldn't they have been remarking?