English verb conjugation
CAN SPY

Regular verb: spy - spied - spied

Affirmation

Simple form	V-ing form
I can spy you can spy he can spy we can spy you can spy they can spy	I can be spying you can be spying he can be spying we can be spying you can be spying they can be spying
Perfect	V-ing perfect
I can have spied you can have spied he can have spied we can have spied you can have spied they can have spied	I can have been spying you can have been spying he can have been spying we can have been spying you can have been spying they can have been spying

Negation

Simple form	V-ing form
I can't spy you can't spy he can't spy we can't spy you can't spy they can't spy	I can't be spying you can't be spying he can't be spying we can't be spying you can't be spying they can't be spying
Perfect	V-ing perfect
I can't have spied you can't have spied he can't have spied we can't have spied you can't have spied they can't have spied	I can't have been spying you can't have been spying he can't have been spying we can't have been spying you can't have been spying they can't have been spying

Interrogative form

Simple form	V-ing form
can I spy? can you spy? can he spy? can we spy? can you spy? can they spy?	can I be spying? can you be spying? can he be spying? can we be spying? can you be spying? can they be spying?
Perfect	V-ing perfect
can I have spied? can you have spied? can he have spied? can we have spied? can you have spied? can they have spied?	can I have been spying? can you have been spying? can he have been spying? can we have been spying? can you have been spying? can they have been spying?

Interro-negative form

Simple form	V-ing form
can't I spy? can't you spy? can't he spy? can't we spy? can't you spy? can't they spy?	can't I be spying? can't you be spying? can't he be spying? can't we be spying? can't you be spying? can't they be spying?
Perfect	V-ing perfect
can't I have spied? can't you have spied? can't he have spied? can't we have spied? can't you have spied? can't they have spied?	can't I have been spying? can't you have been spying? can't he have been spying? can't we have been spying? can't you have been spying? can't they have been spying?