Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can speak. talk you can speak. talk he can speak. talk we can speak. talk you can speak. talk they can speak. talk
V-ing form
I can be speak. talking you can be speak. talking he can be speak. talking we can be speak. talking you can be speak. talking they can be speak. talking
Perfect
I can have speak. talked you can have speak. talked he can have speak. talked we can have speak. talked you can have speak. talked they can have speak. talked
V-ing perfect
I can have been speak. talking you can have been speak. talking he can have been speak. talking we can have been speak. talking you can have been speak. talking they can have been speak. talking
Negation
Simple form
I cannot speak. talk you cannot speak. talk he cannot speak. talk we cannot speak. talk you cannot speak. talk they cannot speak. talk
V-ing form
I cannot be speak. talking you cannot be speak. talking he cannot be speak. talking we cannot be speak. talking you cannot be speak. talking they cannot be speak. talking
Perfect
I cannot have speak. talked you cannot have speak. talked he cannot have speak. talked we cannot have speak. talked you cannot have speak. talked they cannot have speak. talked
V-ing perfect
I cannot have been speak. talking you cannot have been speak. talking he cannot have been speak. talking we cannot have been speak. talking you cannot have been speak. talking they cannot have been speak. talking
Interrogative form
Simple form
can I speak. talk? can you speak. talk? can he speak. talk? can we speak. talk? can you speak. talk? can they speak. talk?
V-ing form
can I be speak. talking? can you be speak. talking? can he be speak. talking? can we be speak. talking? can you be speak. talking? can they be speak. talking?
Perfect
can I have speak. talked? can you have speak. talked? can he have speak. talked? can we have speak. talked? can you have speak. talked? can they have speak. talked?
V-ing perfect
can I have been speak. talking? can you have been speak. talking? can he have been speak. talking? can we have been speak. talking? can you have been speak. talking? can they have been speak. talking?
Interro-negative form
Simple form
can I not speak. talk? can you not speak. talk? can he not speak. talk? can we not speak. talk? can you not speak. talk? can they not speak. talk?
V-ing form
can I not be speak. talking? can you not be speak. talking? can he not be speak. talking? can we not be speak. talking? can you not be speak. talking? can they not be speak. talking?
Perfect
can I not have speak. talked? can you not have speak. talked? can he not have speak. talked? can we not have speak. talked? can you not have speak. talked? can they not have speak. talked?
V-ing perfect
can I not have been speak. talking? can you not have been speak. talking? can he not have been speak. talking? can we not have been speak. talking? can you not have been speak. talking? can they not have been speak. talking?