English verb conjugation
COULD NECK

Regular verb: neck - necked - necked

Affirmation

Simple form	V-ing form
I could neck you could neck he could neck we could neck you could neck they could neck	I could be necking you could be necking he 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 he 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 he 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 he 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 he 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 he 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 he 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 he neck? could we neck? could you neck? could they neck?	could I be necking? could you be necking? could he 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 he 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 he 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 he 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 he 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 he 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 he have been necking? couldn't we have been necking? couldn't you have been necking? couldn't they have been necking?