To identify the correct sentence from the given options, we need to understand the rules of English sentence structure and the appropriate placement of modifiers like "certainly."
Option Analysis:
"He made a fool of certainly himself": The modifier "certainly" is incorrectly placed between the noun phrases, making the sentence awkward and grammatically incorrect.
"Certainly he made a fool of himself": Here, "certainly" is correctly placed at the beginning of the sentence to modify the entire clause, indicating a degree of certainty about the action.
"Certainly a fool he made of himself": This sentence is grammatically unusual as it disrupts the typical subject-verb-object order, making it awkward for standard English usage.
"He made a certainly fool of himself": The adverb "certainly" is incorrectly modifying "fool," which is not semantically logical.
Conclusion:
Based on the analysis, the correct sentence is "Certainly he made a fool of himself," which appropriately uses "certainly" to enhance the meaning of the sentence while maintaining grammatical order.