English verb conjugation
CAN SPEAR

Regular verb: spear - speared - speared

Affirmation

Simple form	V-ing form
I can spear you can spear he can spear we can spear you can spear they can spear	I can be spearing you can be spearing he 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 he 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 he 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 he 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 he 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 he 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 he 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 he spear? can we spear? can you spear? can they spear?	can I be spearing? can you be spearing? can he 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 he 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 he 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 he 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 he 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 he 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 he have been spearing? can't we have been spearing? can't you have been spearing? can't they have been spearing?