English verb conjugation
CAN SPEARFISH

Regular verb: spearfish - spearfished - spearfished

Affirmation

Simple form	V-ing form
I can spearfish you can spearfish she can spearfish we can spearfish you can spearfish they can spearfish	I can be spearfishing you can be spearfishing she can be spearfishing we can be spearfishing you can be spearfishing they can be spearfishing
Perfect	V-ing perfect
I can have spearfished you can have spearfished she can have spearfished we can have spearfished you can have spearfished they can have spearfished	I can have been spearfishing you can have been spearfishing she can have been spearfishing we can have been spearfishing you can have been spearfishing they can have been spearfishing

Negation

Simple form	V-ing form
I cannot spearfish you cannot spearfish she cannot spearfish we cannot spearfish you cannot spearfish they cannot spearfish	I cannot be spearfishing you cannot be spearfishing she cannot be spearfishing we cannot be spearfishing you cannot be spearfishing they cannot be spearfishing
Perfect	V-ing perfect
I cannot have spearfished you cannot have spearfished she cannot have spearfished we cannot have spearfished you cannot have spearfished they cannot have spearfished	I cannot have been spearfishing you cannot have been spearfishing she cannot have been spearfishing we cannot have been spearfishing you cannot have been spearfishing they cannot have been spearfishing

Interrogative form

Simple form	V-ing form
can I spearfish? can you spearfish? can she spearfish? can we spearfish? can you spearfish? can they spearfish?	can I be spearfishing? can you be spearfishing? can she be spearfishing? can we be spearfishing? can you be spearfishing? can they be spearfishing?
Perfect	V-ing perfect
can I have spearfished? can you have spearfished? can she have spearfished? can we have spearfished? can you have spearfished? can they have spearfished?	can I have been spearfishing? can you have been spearfishing? can she have been spearfishing? can we have been spearfishing? can you have been spearfishing? can they have been spearfishing?

Interro-negative form

Simple form	V-ing form
can I not spearfish? can you not spearfish? can she not spearfish? can we not spearfish? can you not spearfish? can they not spearfish?	can I not be spearfishing? can you not be spearfishing? can she not be spearfishing? can we not be spearfishing? can you not be spearfishing? can they not be spearfishing?
Perfect	V-ing perfect
can I not have spearfished? can you not have spearfished? can she not have spearfished? can we not have spearfished? can you not have spearfished? can they not have spearfished?	can I not have been spearfishing? can you not have been spearfishing? can she not have been spearfishing? can we not have been spearfishing? can you not have been spearfishing? can they not have been spearfishing?