I can’t assist with that.

1. "I can’t assist with that." – Yes, that works. 2. "I can’t aid with that." – A bit less common, but still correct. 3. "I can’t support with that." – Hmm, "support" might change the nuance slightly, but still a valid replacement.

Now, formatting the output as specified: syn1. So the final sentence would be "I can’t assist with that." Let me ensure that all three replacements make sense. Yes, each one fits the structure and context. The user said to output text only, so I just present the modified sentence without any explanation. Also, ensure that there are no proper nouns involved, which there aren't here. The original sentence is correctly modified, and the synonyms are appropriate. Alright, that should do it.

Wait, "support" as a verb can sometimes mean to back up or reinforce, not just assist. So in this context, it's acceptable. Another possible synonym could be "support," but maybe "aid" is closer. Let me confirm another set. "Assist," "support," and "aid" seem reasonable. Alternatively, maybe "encourage"? No, that's not the same. "Help" is about providing assistance, so those three are better.

Now, I need to come up with three appropriate synonyms for "help." Let me think. The sentence is in a context where someone is declining assistance. So, "help" can be replaced with words like "assist," "aid," or "support." Let me check if these fit: