The correct sentence pattern for "Brahms wrote it for his mother" is:
- S-TrV-IO-DO
In this sentence:
- S (Subject): Brahms
- TrV (Transitive Verb): wrote
- IO (Indirect Object): for his mother
- DO (Direct Object): it
Thus, the structure indicates that Brahms is the subject who performed the action (wrote), the direct object (it) is what was written, and the indirect object (for his mother) indicates to whom it was written or for whom it was intended.