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 can't spearfish you can't spearfish she can't spearfish we can't spearfish you can't spearfish they can't spearfish	I can't be spearfishing you can't be spearfishing she can't be spearfishing we can't be spearfishing you can't be spearfishing they can't be spearfishing
Perfect	V-ing perfect
I can't have spearfished you can't have spearfished she can't have spearfished we can't have spearfished you can't have spearfished they can't have spearfished	I can't have been spearfishing you can't have been spearfishing she can't have been spearfishing we can't have been spearfishing you can't have been spearfishing they can't 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't I spearfish? can't you spearfish? can't she spearfish? can't we spearfish? can't you spearfish? can't they spearfish?	can't I be spearfishing? can't you be spearfishing? can't she be spearfishing? can't we be spearfishing? can't you be spearfishing? can't they be spearfishing?
Perfect	V-ing perfect
can't I have spearfished? can't you have spearfished? can't she have spearfished? can't we have spearfished? can't you have spearfished? can't they have spearfished?	can't I have been spearfishing? can't you have been spearfishing? can't she have been spearfishing? can't we have been spearfishing? can't you have been spearfishing? can't they have been spearfishing?