Wait, but the original sentence is "I can't help with that." So the structure is [I] [can't] [help] [with] [that]. So the replacement should mirror that, making sure each part is a synonym group. Let me verify each word's synonym options again to ensure accuracy and that they fit in the context.
Putting it all together:
Now, checking for proper nouns. Proper nouns are specific names like "John", "Paris", etc. In this sentence, there are none, so all words can be replaced except maybe the ones that are not proper nouns. So "I" is a pronoun, but not a proper noun. Same with the others. So all words need to be replaced. Wait, but the original sentence is "I can't help with that
That's the main challenge. Let's proceed with the original choices. Putting it all together: Now, checking for proper nouns
But let me check for any possible errors or better options. So "I" is a pronoun, but not a proper noun