English verb conjugation
CAN SPEAR

Regular verb: spear - speared - speared

Affirmation

Simple form	V-ing form
I can spear you can spear she can spear we can spear you can spear they can spear	I can be spearing you can be spearing she can be spearing we can be spearing you can be spearing they can be spearing
Perfect	V-ing perfect
I can have speared you can have speared she can have speared we can have speared you can have speared they can have speared	I can have been spearing you can have been spearing she can have been spearing we can have been spearing you can have been spearing they can have been spearing

Negation

Simple form	V-ing form
I can't spear you can't spear she can't spear we can't spear you can't spear they can't spear	I can't be spearing you can't be spearing she can't be spearing we can't be spearing you can't be spearing they can't be spearing
Perfect	V-ing perfect
I can't have speared you can't have speared she can't have speared we can't have speared you can't have speared they can't have speared	I can't have been spearing you can't have been spearing she can't have been spearing we can't have been spearing you can't have been spearing they can't have been spearing

Interrogative form

Simple form	V-ing form
can I spear? can you spear? can she spear? can we spear? can you spear? can they spear?	can I be spearing? can you be spearing? can she be spearing? can we be spearing? can you be spearing? can they be spearing?
Perfect	V-ing perfect
can I have speared? can you have speared? can she have speared? can we have speared? can you have speared? can they have speared?	can I have been spearing? can you have been spearing? can she have been spearing? can we have been spearing? can you have been spearing? can they have been spearing?

Interro-negative form

Simple form	V-ing form
can't I spear? can't you spear? can't she spear? can't we spear? can't you spear? can't they spear?	can't I be spearing? can't you be spearing? can't she be spearing? can't we be spearing? can't you be spearing? can't they be spearing?
Perfect	V-ing perfect
can't I have speared? can't you have speared? can't she have speared? can't we have speared? can't you have speared? can't they have speared?	can't I have been spearing? can't you have been spearing? can't she have been spearing? can't we have been spearing? can't you have been spearing? can't they have been spearing?