"I" → myself "can’t" → unable "help" → support "with" → beside (maybe "along", "using", "through") "that" → that

Finally, "that". Synonyms for "that" could be "those", "that", "this" but depending on context. Wait, "that" is a determiner or pronoun here. So maybe "those", "that", "the one". But "those" is plural. Alternatively, "this", "that", "the former". Hmm. Maybe better to use "those", "that", "the one".

"Can't" → cannot, unable, not able.