English verb conjugation
COULD HALF-MAST

Regular verb: half-mast - half-masted - half-masted

Affirmation

Simple form	V-ing form
I could half-mast you could half-mast she could half-mast we could half-mast you could half-mast they could half-mast	I could be half-masting you could be half-masting she could be half-masting we could be half-masting you could be half-masting they could be half-masting
Perfect	V-ing perfect
I could have half-masted you could have half-masted she could have half-masted we could have half-masted you could have half-masted they could have half-masted	I could have been half-masting you could have been half-masting she could have been half-masting we could have been half-masting you could have been half-masting they could have been half-masting

Negation

Simple form	V-ing form
I couldn't half-mast you couldn't half-mast she couldn't half-mast we couldn't half-mast you couldn't half-mast they couldn't half-mast	I couldn't be half-masting you couldn't be half-masting she couldn't be half-masting we couldn't be half-masting you couldn't be half-masting they couldn't be half-masting
Perfect	V-ing perfect
I couldn't have half-masted you couldn't have half-masted she couldn't have half-masted we couldn't have half-masted you couldn't have half-masted they couldn't have half-masted	I couldn't have been half-masting you couldn't have been half-masting she couldn't have been half-masting we couldn't have been half-masting you couldn't have been half-masting they couldn't have been half-masting

Interrogative form

Simple form	V-ing form
could I half-mast? could you half-mast? could she half-mast? could we half-mast? could you half-mast? could they half-mast?	could I be half-masting? could you be half-masting? could she be half-masting? could we be half-masting? could you be half-masting? could they be half-masting?
Perfect	V-ing perfect
could I have half-masted? could you have half-masted? could she have half-masted? could we have half-masted? could you have half-masted? could they have half-masted?	could I have been half-masting? could you have been half-masting? could she have been half-masting? could we have been half-masting? could you have been half-masting? could they have been half-masting?

Interro-negative form

Simple form	V-ing form
couldn't I half-mast? couldn't you half-mast? couldn't she half-mast? couldn't we half-mast? couldn't you half-mast? couldn't they half-mast?	couldn't I be half-masting? couldn't you be half-masting? couldn't she be half-masting? couldn't we be half-masting? couldn't you be half-masting? couldn't they be half-masting?
Perfect	V-ing perfect
couldn't I have half-masted? couldn't you have half-masted? couldn't she have half-masted? couldn't we have half-masted? couldn't you have half-masted? couldn't they have half-masted?	couldn't I have been half-masting? couldn't you have been half-masting? couldn't she have been half-masting? couldn't we have been half-masting? couldn't you have been half-masting? couldn't they have been half-masting?