Able and Enable
Incorrect : The patient does not able to talk.
Correct : The patient is not able to talk. Or The patient cannot talk.
Incorrect : The patient is enable to talk.
Correct : The patient is unable to talk. Or The patient is not able to talk.
Note : Able is an adjective the antonym of which is unable, not enable. Enable is a verb. You can say:
This book will enable you to write correct English.
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