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Read one possible answer and its reasoning查看一种可能的例答及解释
Portam custōdīte. Nōlīte ex urbe discēdere.
A command changes the relation between speaker and hearer. It need not be a harsh order: social situation and surrounding words matter.指令改变说话者与听者的关系，并非必为严厉命令：社会情境及周围措辞也重要。
The example uses one regular negative construction. Ne with a perfect subjunctive is another option; it requires different forms and contextual discussion.例答采用一种常见禁令结构。Ne 加完成虚拟式是另一选择，须另核词形并讨论语境。
τὴν πύλην φυλάττετε. μὴ τὴν πόλιν λείπετε.
Do not treat μή plus a present imperative as proof that the hearer has already begun the action. Smyth §1841 explicitly recognizes contextual variation.不能据 μή 加现在命令式断定听者已经开始行动。斯迈思 §1841 明确指出语境差异。
A command in the third person requires a different ending. Positive third-person imperative φυλαττόντων is given in the variation.第三人称指令需要另一词尾；变化练习提供肯定第三人称命令式 φυλαττόντων。
This is an authored example; other answers may preserve the intended meaning and fit the context.此为编写示例；其他答案也可能保留预期意义，并符合语境。
Change one choice, then connect the choices改变一项选择，再把选择连接起来
Variation 1变化练习 1
Address one soldier instead.改为对一名士兵说。
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Use singular custōdī and nōlī.用单数 custōdī 及 nōlī。
Use singular φύλαττε and λεῖπε.用单数 φύλαττε 及 λεῖπε。
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Portam custōdī. Nōlī ex urbe discēdere.
Both commands follow the audience’s singular number.两项指令均随单数听众调整。
τὴν πύλην φύλαττε. μὴ τὴν πόλιν λεῖπε.
The command endings become singular; the objects stay unchanged.命令词尾变为单数；宾语不变。
Variation 2变化练习 2
Instruct someone else: let the soldiers guard the gate.指示第三方：让士兵们守卫城门。
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Use present subjunctive custōdiant.用现在虚拟式 custōdiant。
Use third-person plural imperative φυλαττόντων.用第三人称复数命令式 φυλαττόντων。
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Mīlitēs portam custōdiant.
A third-person instruction uses the Latin subjunctive here.此处第三人称指令用拉丁虚拟式。
οἱ στρατιῶται τὴν πύλην φυλαττόντων.
Greek supplies a third-person imperative form. The two languages need not use matching mood labels.希腊语有第三人称命令式；两种语言不必使用同名语气。
Variation 3变化练习 3
Report an order: the general orders the soldiers to guard the city.转述命令：将军命令士兵们守卫城市。
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Iubet takes an accusative person and infinitive.Iubet 带宾格受命者和不定式。
Κελεύει takes the ordered person in the accusative and an infinitive.Κελεύει 带宾格受命者和不定式。
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Dux mīlitēs urbem custōdīre iubet.
This is a report of an order, rather than a direct imperative to the audience.这是命令的报告，并非向听众直接发出命令式。
Woodcock §126 — A positive direct second-person command uses the imperative.直接对第二人称发出的肯定命令可用命令式。
Woodcock §127 — Instructions about a third person can use the present subjunctive.针对第三人称的指令可用现在虚拟式。
Woodcock §128 — Noli/nolite with an infinitive is a regular second-person prohibition.noli/nolite 加不定式是常见第二人称禁令。
Smyth §1835 — Imperatives express commands, requests and related acts.命令式表达命令、请求及相关行为。
Smyth §1840 — Second-person prohibitions can use μή with a present imperative.第二人称禁令可用 μή 加现在命令式。
Smyth §1841 — The context qualifies the interpretation of a present-imperative prohibition.现在命令式禁令的理解须结合语境。
Woodcock §23 — Infinitive complement after iubeo.iubeo 后的不定式补语。
Smyth §1991 — Infinitive complements after verbs of will and command.意愿及命令动词后的不定式补语。
Smyth §1992 — Accusative object and infinitive after κελεύω.κελεύω 后的宾格宾语与不定式。
Original examples and explanations remain drafts pending independent language review.编写例答及解释仍为草案，等待独立语言审阅。
Keep or analyse a response elsewhere保存作答或送往其他工作区分析
Choose one response to export as a Syntax Studio source. Only that text is included; reflections and model answers stay outside this export. Import and a composition fork remain explicit actions in Cursus.选择一项作答，导出为 Syntax Studio 的源文本。只包含所选文本，不含反思或例答。在 Cursus 中，导入及建立写作分支仍须明确操作。