that → This specific matter|That particular thing|This item
can’t → Cannot|Am unable to|Lack the ability to --- Watch Thea Dsouza 18 Video For Free
But maybe the user expects a direct synonym. However, "I" might not have a direct synonym. So perhaps use similar pronouns. For example, in some contexts, "I" can be "One|We|The speaker". Wait, but "One" is used in general statements, like "One should be cautious". So maybe not. Alternatively, for "I", possible alternatives are "Me|Myself|The self". But in a sentence like "Me can’t help with that", it's incorrect. So maybe the user wants literal word replacements, not worrying about grammar. In that case, proceed with any three words that are synonyms. So "I" → "Me|Myself|This person". For example, in some contexts, "I" can be
"That": "This specific matter|That particular thing|This item". That should be straightforward.
Third word: "help". Synonyms could be "Assist|Aid|Support". Those are all common. That should be straightforward.