English verb conjugation
COULD NECK

Regular verb: neck - necked - necked

Affirmation

Simple form	V-ing form
I could neck you could neck she could neck we could neck you could neck they could neck	I could be necking you could be necking she could be necking we could be necking you could be necking they could be necking
Perfect	V-ing perfect
I could have necked you could have necked she could have necked we could have necked you could have necked they could have necked	I could have been necking you could have been necking she could have been necking we could have been necking you could have been necking they could have been necking

Negation

Simple form	V-ing form
I couldn't neck you couldn't neck she couldn't neck we couldn't neck you couldn't neck they couldn't neck	I couldn't be necking you couldn't be necking she couldn't be necking we couldn't be necking you couldn't be necking they couldn't be necking
Perfect	V-ing perfect
I couldn't have necked you couldn't have necked she couldn't have necked we couldn't have necked you couldn't have necked they couldn't have necked	I couldn't have been necking you couldn't have been necking she couldn't have been necking we couldn't have been necking you couldn't have been necking they couldn't have been necking

Interrogative form

Simple form	V-ing form
could I neck? could you neck? could she neck? could we neck? could you neck? could they neck?	could I be necking? could you be necking? could she be necking? could we be necking? could you be necking? could they be necking?
Perfect	V-ing perfect
could I have necked? could you have necked? could she have necked? could we have necked? could you have necked? could they have necked?	could I have been necking? could you have been necking? could she have been necking? could we have been necking? could you have been necking? could they have been necking?

Interro-negative form

Simple form	V-ing form
couldn't I neck? couldn't you neck? couldn't she neck? couldn't we neck? couldn't you neck? couldn't they neck?	couldn't I be necking? couldn't you be necking? couldn't she be necking? couldn't we be necking? couldn't you be necking? couldn't they be necking?
Perfect	V-ing perfect
couldn't I have necked? couldn't you have necked? couldn't she have necked? couldn't we have necked? couldn't you have necked? couldn't they have necked?	couldn't I have been necking? couldn't you have been necking? couldn't she have been necking? couldn't we have been necking? couldn't you have been necking? couldn't they have been necking?