语法课程 10
min de lecture
TOEIC® 情态动词:完成式情态、商务邮件用法与常见陷阱
掌握 TOEIC® Part 5 的全部 9 个情态动词:可能性强弱、完成式情态(should have、could have)、商务邮件句型、半情态动词,以及 5 大常见陷阱。
GrammarModal VerbsTOEICPerfect ModalsBusiness English
情态动词:TOEIC® Part 5 的关键
情态动词(can, could, may, might, will, would, shall, should, must)是改变主要动词含义的助动词。它们用来表达能力、许可、义务、建议或可能性。在 TOEIC® 中,它们约占 Part 5 题目的 15-20%,并且经常出现在 Part 6 的电子邮件中。
情态动词的语法规则很严格:第三人称不加 -s,后接不带 to 的动词原形,没有不定式或分词形式。掌握这些规则,是你在 TOEIC 备考中快速提分的捷径。
快速参考表
按主要功能整理的 9 个纯情态动词:
| 情态动词 | 主要功能 | TOEIC® 例句 |
|---|---|---|
| can | 能力 / 非正式许可 | She can process 50 orders per hour. |
| could | 过去的能力 / 礼貌 | Could you forward the attachment? |
| may | 正式许可 / 可能性 | Employees may request a transfer. |
| might | 较弱的可能性 | The shipment might be delayed. |
| will | 将来 / 意愿 | The board will announce the results. |
| would | 条件 / 礼貌 | Would you like to reschedule? |
| shall | 合同义务 | The tenant shall maintain the property. |
| should | 建议 / 推荐 | You should review the contract first. |
| must | 义务 / 确定 | All visitors must sign in at reception. |
可能性与推断
从最确定到最不确定的把握程度:
| 情态动词 | 程度 | 例句 |
|---|---|---|
| must | 约 95%(几乎确定) | She must be in the office by now. |
| will | 约 90%(预测) | The package will arrive tomorrow. |
| should | 约 75%(合理预期) | The report should be ready by noon. |
| may | 约 50%(较可能的可能性) | The shipment may arrive tomorrow. |
| might / could | 约 30%(较弱的可能性) | The delay could cause problems. |
| can't | 约 0%(逻辑上不可能) | That can't be the right answer. |
完成式情态动词(modal + have + 过去分词)
完成式情态动词是谈论过去动作的关键。它们在 TOEIC® 的 Part 5 和 Part 6 中经常出现,并且常常与被动语态结合使用:
| 完成式情态动词 | 含义 | 例句 |
|---|---|---|
| should have + PP | 本该做(后悔) | You should have submitted the form earlier. |
| could have + PP | 本可以做(未实现) | We could have finished the project on time. |
| must have + PP | 一定做了(对过去的推断) | She must have left the office already. |
| may/might have + PP | 也许做了(过去的可能性) | The package may have been delivered. |
| would have + PP | 本来会(过去的条件) | I would have called, but I lost your number. |
商务邮件中的情态动词
TOEIC® 的 Part 6 和 Part 7 包含大量商务邮件。以下是最常见的情态动词表达:
| 意图 | 表达 |
|---|---|
| 礼貌请求 | Could you please send me the updated report? |
| 提议 | Would you like to schedule a follow-up meeting? |
| 义务 | All participants must confirm their attendance by Friday. |
| 推荐 | You should review the attached document before the meeting. |
| 可能性 | The delivery may be delayed due to weather conditions. |
| 承诺 | We will process your order within 24 hours. |
半情态动词
| 半情态动词 | 对应的情态动词 | 例句 |
|---|---|---|
| have to | must(义务) | She had to reschedule the meeting. |
| be able to | can(能力) | He will be able to attend. |
| be going to | will(将来) | We are going to launch next month. |
| need to | must(必要) | You need to sign the form. |
| used to | (过去的习惯) | I used to work in marketing. |
TOEIC® 最常见的 5 个陷阱
- Must vs have to:must 用于个人义务,have to 用于外部义务。在过去时中,只有 had to 是正确的
- Can vs may:can 用于能力或非正式许可,may 用于正式许可或可能性
- Should vs must:should 是建议,must 是义务
- Would vs will:would 用于 条件句 和礼貌表达,will 用于确定的将来
- 不能叠加两个情态动词:绝不能说 *will can。要用 will be able to 代替
想要练习这些陷阱,可以试试我们的免费 TOEIC 练习,或者做一套免费 TOEIC 模拟测试来评估你的水平。
常见问题
Can 表示当前的能力或非正式的许可。Could 是 can 的过去式,也可以表示礼貌的请求(Could you help me?)。
Must 表示个人的义务。Have to 表示外部的义务。在过去时中,只能用 had to。
是的,情态动词大约出现在 15-20% 的 Part 5 题目中。它们也会出现在 Part 6 的电子邮件和 Part 3 的对话里。
完成式情态动词由情态动词 + have + 过去分词构成。例如:should have submitted。它用来谈论过去没有发生的动作。
May 表示可能性较高的情况(约 50%)。Might 表示可能性较低的情况(约 30%)。
用 990prep 掌握情态动词
情态动词约占 Part 5 题目的 15-20%。用 990prep 在真实的商务邮件和职场情境中练习,彻底掌握它们。
真实模拟练习 详细的解析说明 进度追踪
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