So the output would be: You must not help on it.
Substituting each word:
Last word is "that". Pronoun refering to something specific. Alternatives could be "this", "it", "those". Or maybe "that" is part of the phrase "this", "those", "such". Wait, "that" is a demonstrative pronoun. Replacements might be "this", "it", "those". But need to see the context. In "help with that", "that" refers to the thing being helped. So possible options: this. tamil actress roja with out dress