- "that" can be replaced with "this|it|that object". Wait, maybe "this|that thing|that particular". But need three synonyms. "this|it|that" but "this" is a bit different. Alternatively "that thing|that|it".

I cannot help by means of it

But need to check for correct synonyms and contractions. Also, the user wants the result only, no explanations. So the final answer would be:

Putting it all together:

"I" → "Me|Myself|This one" "can’t" → "Can not|Cannot|Won’t" "help" → "Assist|Support|Aid" "with" → "By means of|Using|Through" "that" → "This|It|That particular"