English verb conjugation
CAN LUMP

Regular verb: lump - lumped - lumped

Affirmation

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

Negation

Simple form	V-ing form
I can't lump you can't lump he can't lump we can't lump you can't lump they can't lump	I can't be lumping you can't be lumping he can't be lumping we can't be lumping you can't be lumping they can't be lumping
Perfect	V-ing perfect
I can't have lumped you can't have lumped he can't have lumped we can't have lumped you can't have lumped they can't have lumped	I can't have been lumping you can't have been lumping he can't have been lumping we can't have been lumping you can't have been lumping they can't have been lumping

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I lump? can't you lump? can't he lump? can't we lump? can't you lump? can't they lump?	can't I be lumping? can't you be lumping? can't he be lumping? can't we be lumping? can't you be lumping? can't they be lumping?
Perfect	V-ing perfect
can't I have lumped? can't you have lumped? can't he have lumped? can't we have lumped? can't you have lumped? can't they have lumped?	can't I have been lumping? can't you have been lumping? can't he have been lumping? can't we have been lumping? can't you have been lumping? can't they have been lumping?