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 cannot guess you cannot guess he cannot guess we cannot guess you cannot guess they cannot guess	I cannot be guessing you cannot be guessing he cannot be guessing we cannot be guessing you cannot be guessing they cannot be guessing
Perfect	V-ing perfect
I cannot have guessed you cannot have guessed he cannot have guessed we cannot have guessed you cannot have guessed they cannot have guessed	I cannot have been guessing you cannot have been guessing he cannot have been guessing we cannot have been guessing you cannot have been guessing they cannot 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 I not guess? can you not guess? can he not guess? can we not guess? can you not guess? can they not guess?	can I not be guessing? can you not be guessing? can he not be guessing? can we not be guessing? can you not be guessing? can they not be guessing?
Perfect	V-ing perfect
can I not have guessed? can you not have guessed? can he not have guessed? can we not have guessed? can you not have guessed? can they not have guessed?	can I not have been guessing? can you not have been guessing? can he not have been guessing? can we not have been guessing? can you not have been guessing? can they not have been guessing?