The sentence "Some works known as requiems differ from true requiems." can be analyzed as follows:
- The subject is "Some works known as requiems."
- The verb is "differ."
- The object (in this case, a prepositional phrase) is "from true requiems."
Since "differ" is an intransitive verb (it does not take a direct object), we categorize the sentence as a subject followed by an intransitive verb.
Thus, the correct sentence pattern is:
- S-InV
Therefore, the answer is 1. S-InV.