I think that's the best approach. Let me double-check each part. Yes, each word is replaced with three synonyms where possible. Even if some are close rather than exact, that's the best effort. Proper nouns weren't present, so all words are processed. The output is spintax formatted as requested.
So, finalizing:
Moving on, "can’t" – synonyms would be "can't", "cannot", "am unable to". So am unable to?
Putting it all together, the sentence would be: