can lump
Regular verb: lump - lumped- lumped

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