Complex sentence: The smooth and courtly language they employ immediately establishes them as sycophants who are really serving as spies for the corrupt King Claudius, Hamlet's uncle, who usurped the throne and constantly attempts to check his nephew.
Split into simpler sentences: The smooth and courtly language they employ immediately establishes them as sycophants. In reality, however, they serve as spies for the corrupt King Claudius, Hamlet's uncle, who usurped the throne and constantly attempts to check his nephew.