she looks at him, concerned (nonfinite adverbial clause using the past participle, modifying the main clause) she looks at him, not understanding (nonfinite adverbial clause using the present participle, modifying the main clause) He looks at her, emotional (seems to be a postmodifying adjective for he ) Amy looks at him, considering (nonfinite adverbial clause using the present participle, modifying the main clause) I could be wrong. They may all be adjectival clauses modifying the subject. There may be other interpretations.
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