Sentence rearrangement (PQRS): Arrange the parts to build a coherent sentence about a master punishing his servant — placing the defining relative clause right after 'the servant' and ordering time/manner phrases logically.

Given data

• Starter: 'The master'
• P: who was very loyal to him
• Q: punished the servant
• R: without giving any valid reason
• S: when he left the work unfinished

Concept/Approach
A defining relative clause beginning with 'who' must directly follow its antecedent ('the servant'). Then we can add adverbials of time/cause (S) and manner (R).

Step-by-step ordering
1) Main clause: 'The master punished the servant...' (Q)2) Define 'the servant': '...who was very loyal to him...' (P)3) Time/cause adverbial: '...when he left the work unfinished...' (S)4) Manner adverbial: '...without giving any valid reason.' (R)Full sentence: 'The master punished the servant who was very loyal to him when he left the work unfinished without giving any valid reason.'

Common pitfalls
Placing P away from 'the servant' misassigns the relative pronoun; starting with R or S leaves the main clause incomplete.

Final Answer
QPSR