Interrogation

1. Introduction
2. Absolute interrogatives
         a) Non-manual components
         b) ‘Yes-no’ sign
         c) Repetition of the pronominal sign
         d) Alternative interrogatives
3. Partial interrogatives
         a) Non-manual component
         b) Interrogative signs
4. Rhetorical questions

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It's important to bear in mind that the rhetorical question is the same as a partial question regarding the manual part (it includes an interrogative sign in the final position), but the non-manual markers are different, because they must be signed with raised eyebrows.

    "What they are really interested in is protagonism."
    "The place where the accident took place is on the outskirts of Bilbao."