English verb conjugation
CAN GUESS

Regular verb: guess - guessed - guessed

Affirmation

Simple form	V-ing form
I can guess you can guess he can guess we can guess you can guess they can guess	I can be guessing you can be guessing he can be guessing we can be guessing you can be guessing they can be guessing
Perfect	V-ing perfect
I can have guessed you can have guessed he can have guessed we can have guessed you can have guessed they can have guessed	I can have been guessing you can have been guessing he can have been guessing we can have been guessing you can have been guessing they can have been guessing

Negation

Simple form	V-ing form
I can't guess you can't guess he can't guess we can't guess you can't guess they can't guess	I can't be guessing you can't be guessing he can't be guessing we can't be guessing you can't be guessing they can't be guessing
Perfect	V-ing perfect
I can't have guessed you can't have guessed he can't have guessed we can't have guessed you can't have guessed they can't have guessed	I can't have been guessing you can't have been guessing he can't have been guessing we can't have been guessing you can't have been guessing they can't have been guessing

Interrogative form

Simple form	V-ing form
can I guess? can you guess? can he guess? can we guess? can you guess? can they guess?	can I be guessing? can you be guessing? can he be guessing? can we be guessing? can you be guessing? can they be guessing?
Perfect	V-ing perfect
can I have guessed? can you have guessed? can he have guessed? can we have guessed? can you have guessed? can they have guessed?	can I have been guessing? can you have been guessing? can he have been guessing? can we have been guessing? can you have been guessing? can they have been guessing?

Interro-negative form

Simple form	V-ing form
can't I guess? can't you guess? can't he guess? can't we guess? can't you guess? can't they guess?	can't I be guessing? can't you be guessing? can't he be guessing? can't we be guessing? can't you be guessing? can't they be guessing?
Perfect	V-ing perfect
can't I have guessed? can't you have guessed? can't he have guessed? can't we have guessed? can't you have guessed? can't they have guessed?	can't I have been guessing? can't you have been guessing? can't he have been guessing? can't we have been guessing? can't you have been guessing? can't they have been guessing?