English verb conjugation
COULD LARK

Regular verb: lark - larked - larked

Affirmation

Simple form	V-ing form
I could lark you could lark he could lark we could lark you could lark they could lark	I could be larking you could be larking he could be larking we could be larking you could be larking they could be larking
Perfect	V-ing perfect
I could have larked you could have larked he could have larked we could have larked you could have larked they could have larked	I could have been larking you could have been larking he could have been larking we could have been larking you could have been larking they could have been larking

Negation

Simple form	V-ing form
I couldn't lark you couldn't lark he couldn't lark we couldn't lark you couldn't lark they couldn't lark	I couldn't be larking you couldn't be larking he couldn't be larking we couldn't be larking you couldn't be larking they couldn't be larking
Perfect	V-ing perfect
I couldn't have larked you couldn't have larked he couldn't have larked we couldn't have larked you couldn't have larked they couldn't have larked	I couldn't have been larking you couldn't have been larking he couldn't have been larking we couldn't have been larking you couldn't have been larking they couldn't have been larking

Interrogative form

Simple form	V-ing form
could I lark? could you lark? could he lark? could we lark? could you lark? could they lark?	could I be larking? could you be larking? could he be larking? could we be larking? could you be larking? could they be larking?
Perfect	V-ing perfect
could I have larked? could you have larked? could he have larked? could we have larked? could you have larked? could they have larked?	could I have been larking? could you have been larking? could he have been larking? could we have been larking? could you have been larking? could they have been larking?

Interro-negative form

Simple form	V-ing form
couldn't I lark? couldn't you lark? couldn't he lark? couldn't we lark? couldn't you lark? couldn't they lark?	couldn't I be larking? couldn't you be larking? couldn't he be larking? couldn't we be larking? couldn't you be larking? couldn't they be larking?
Perfect	V-ing perfect
couldn't I have larked? couldn't you have larked? couldn't he have larked? couldn't we have larked? couldn't you have larked? couldn't they have larked?	couldn't I have been larking? couldn't you have been larking? couldn't he have been larking? couldn't we have been larking? couldn't you have been larking? couldn't they have been larking?