Yes, but the distinction matters: a reusable structure — the skeleton of how you organize an argument or an email — is fine and genuinely efficient to reuse across prompts. A full memorized template with fixed sentences plugged in for any prompt tends to backfire, because it doesn't fit the specific question asked, and graders are trained to notice generic, recited-sounding writing.
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A structural shape is safe and expected: for Write for an Academic Discussion, a position, one well-developed reason, a brief acknowledgment of a counterpoint, and a close is a reliable shape to reuse every time — what changes is the specific content, not the underlying structure. For Write an Email, a brief greeting, a clear statement of the situation, a specific request, and a professional close is similarly safe to reuse as a skeleton.
Full sentences memorized word-for-word and dropped into any response are the risk. Generic opening lines ("In today's society, this is an important topic...") that could apply to nearly any prompt are a specific pattern graders are trained to flag, since they signal a response isn't genuinely engaging with the specific question asked — which directly hurts your task completion score, one of the four core scoring criteria.
Rather than copying someone else's template, write two or three practice responses on different prompts and notice what shape naturally works for you — most strong writers converge on a similar skeleton on their own. Once you have a structure that consistently produces complete, well-organized responses, reusing that shape (not specific sentences) across the real test's prompts is both safe and efficient, since it frees up thinking time for the actual content rather than the format.
Understand exactly what task completion, organization, grammar, and vocabulary mean in practice.