English verb conjugation
COULD PRELUDE

Regular verb: prelude - preluded - preluded

Affirmation

Simple form	V-ing form
I could prelude you could prelude he could prelude we could prelude you could prelude they could prelude	I could be preluding you could be preluding he could be preluding we could be preluding you could be preluding they could be preluding
Perfect	V-ing perfect
I could have preluded you could have preluded he could have preluded we could have preluded you could have preluded they could have preluded	I could have been preluding you could have been preluding he could have been preluding we could have been preluding you could have been preluding they could have been preluding

Negation

Simple form	V-ing form
I couldn't prelude you couldn't prelude he couldn't prelude we couldn't prelude you couldn't prelude they couldn't prelude	I couldn't be preluding you couldn't be preluding he couldn't be preluding we couldn't be preluding you couldn't be preluding they couldn't be preluding
Perfect	V-ing perfect
I couldn't have preluded you couldn't have preluded he couldn't have preluded we couldn't have preluded you couldn't have preluded they couldn't have preluded	I couldn't have been preluding you couldn't have been preluding he couldn't have been preluding we couldn't have been preluding you couldn't have been preluding they couldn't have been preluding

Interrogative form

Simple form	V-ing form
could I prelude? could you prelude? could he prelude? could we prelude? could you prelude? could they prelude?	could I be preluding? could you be preluding? could he be preluding? could we be preluding? could you be preluding? could they be preluding?
Perfect	V-ing perfect
could I have preluded? could you have preluded? could he have preluded? could we have preluded? could you have preluded? could they have preluded?	could I have been preluding? could you have been preluding? could he have been preluding? could we have been preluding? could you have been preluding? could they have been preluding?

Interro-negative form

Simple form	V-ing form
couldn't I prelude? couldn't you prelude? couldn't he prelude? couldn't we prelude? couldn't you prelude? couldn't they prelude?	couldn't I be preluding? couldn't you be preluding? couldn't he be preluding? couldn't we be preluding? couldn't you be preluding? couldn't they be preluding?
Perfect	V-ing perfect
couldn't I have preluded? couldn't you have preluded? couldn't he have preluded? couldn't we have preluded? couldn't you have preluded? couldn't they have preluded?	couldn't I have been preluding? couldn't you have been preluding? couldn't he have been preluding? couldn't we have been preluding? couldn't you have been preluding? couldn't they have been preluding?