English verb conjugation
COULD LUMP

Regular verb: lump - lumped - lumped

Affirmation

Simple form	V-ing form
I could lump you could lump he could lump we could lump you could lump they could lump	I could be lumping you could be lumping he could be lumping we could be lumping you could be lumping they could be lumping
Perfect	V-ing perfect
I could have lumped you could have lumped he could have lumped we could have lumped you could have lumped they could have lumped	I could have been lumping you could have been lumping he could have been lumping we could have been lumping you could have been lumping they could have been lumping

Negation

Simple form	V-ing form
I could not lump you could not lump he could not lump we could not lump you could not lump they could not lump	I could not be lumping you could not be lumping he could not be lumping we could not be lumping you could not be lumping they could not be lumping
Perfect	V-ing perfect
I could not have lumped you could not have lumped he could not have lumped we could not have lumped you could not have lumped they could not have lumped	I could not have been lumping you could not have been lumping he could not have been lumping we could not have been lumping you could not have been lumping they could not have been lumping

Interrogative form

Simple form	V-ing form
could I lump? could you lump? could he lump? could we lump? could you lump? could they lump?	could I be lumping? could you be lumping? could he be lumping? could we be lumping? could you be lumping? could they be lumping?
Perfect	V-ing perfect
could I have lumped? could you have lumped? could he have lumped? could we have lumped? could you have lumped? could they have lumped?	could I have been lumping? could you have been lumping? could he have been lumping? could we have been lumping? could you have been lumping? could they have been lumping?

Interro-negative form

Simple form	V-ing form
could I not lump? could you not lump? could he not lump? could we not lump? could you not lump? could they not lump?	could I not be lumping? could you not be lumping? could he not be lumping? could we not be lumping? could you not be lumping? could they not be lumping?
Perfect	V-ing perfect
could I not have lumped? could you not have lumped? could he not have lumped? could we not have lumped? could you not have lumped? could they not have lumped?	could I not have been lumping? could you not have been lumping? could he not have been lumping? could we not have been lumping? could you not have been lumping? could they not have been lumping?