Speculation and Deduction: 句子、练习、测试和例句

Speculation and Deduction 使用

推测与推断用于我们根据已知、所见或所闻进行猜测并作出推断时。借助情态动词，我们可以表示我们几乎可以肯定、某事是可能的、某事是不可能的，或者我们预期某事会发生。

She looks exhausted. She must be working too hard.
她看起来筋疲力尽。她一定是工作得太辛苦了。
He may have missed the train.
他可能没赶上火车。
They can’t be at home. All the lights are off.
他们不可能在家。所有的灯都关着。
The parcel should arrive tomorrow.
包裹应该会在明天到达。

Speculation and Deduction 形式

在这个主题中，我们经常根据确定程度以及我们谈论的是现在、正在进行的过程还是过去来使用不同的情态动词。对于已经完成的过去动作，我们通常使用have + V3；而对于当前前后正在发生的过程，我们使用be + Ving。

must + V1 / be + Ving
may / might / could + V1 / be + Ving
can’t + V1 / be + Ving
must / may / might / could / can’t / couldn’t + have + V3
should / ought to + V1
should / ought to + have + V3

She must know the answer.
她一定知道答案。
They might be waiting outside.
他们可能在外面等着。
He can’t have forgotten your birthday.
他不可能忘了你的生日。
The meeting should start soon.
会议应该很快就开始了。

Speculation and Deduction 规则

  • Must 用于表示强烈的推断：我们几乎可以肯定某事是真的。这不是 100% 的事实，但这是一个非常有把握的结论。
    She has been studying all day. She must be tired.
    她学习了一整天。她一定累了。
    Kate doesn’t have her car today. She must have rented one.
    凯特今天没有她的车。她一定是租了一辆。
  • 当某事是可能的，但我们并不确定时，会使用 may、might 和 could。通常，may 和 might 的意思非常接近，而 could 也常常表达可能性。
    The noise may be coming from the neighbours.
    噪音可能是邻居发出的。
    He might have left already.
    他可能已经离开了。
  • 当我们认为某事是不可能的，或表示强烈的不相信或惊讶时，会使用 can’t 和 couldn’t。
    You can’t be serious!
    你不是认真的吧！
    Hannah couldn’t have said that. It doesn’t sound like her.
    汉娜不可能那样说。这听起来不像她会说的话。
  • 如果我们谈论某件正在现在发生的事情，作为一个过程， 我们经常在情态动词后使用be + Ving。
    Amanda might be doing the washing up.
    阿曼达可能正在洗碗。
    He must be talking to the manager right now.
    他现在一定正在和经理说话。
  • 如果这一推断指的是过去已经完成的动作，我们通常使用have + V3。
    ✅ She must have forgotten the keys.
    ✅ They might have taken a taxi.
    ✅ He can’t have seen the message.
  • 在本主题中，should 和 ought to 通常表示一种预期： 我们认为某事很可能是真的，或者原本预料会发生。
    The train should be here by now.
    火车现在应该已经到了。
    They should have told him about the change.
    他们本应该告诉他这个变化。
  • 对于较弱的否定可能性，我们使用may not 和might not。形式couldn’t通常表示 不可能，而不仅仅是较弱的可能性。
    ✅ There might not be enough food for everyone.
    ❌ There couldn’t be enough food for everyone. (if you only mean “maybe not”)
  • 除了情态动词之外，推测也可以用其他词语来表达：be likely to、be unlikely to、be bound to、probably 和 definitely。
    She is likely to forget about the meeting.
    她很可能会忘记这次会议。
    That mistake was bound to happen sooner or later.
    那个错误迟早是会发生的。

Speculation and Deduction 否定

在这个主题中，否定形式取决于意思。 May not / might not = 某事可能不是真的。 Can’t / couldn’t = 这是不可能的。 Shouldn’t 可以表达一种预期，即某事可能不对。

may not / might not + V1
can’t + V1 / be + Ving
can’t / couldn’t + have + V3
shouldn’t + V1 / have + V3

He may not know the address.
他可能不知道那个地址。
They can’t be waiting outside in this weather.
这种天气里，他们不可能还在外面等着。
She couldn’t have taken your bag by mistake.
她不可能误拿了你的包。
The repair shouldn’t take much longer.
修理应该不会再花太多时间。

Speculation and Deduction 问题

在关于推测的问题中，我们经常使用 could、might、should，以及像 Do you think ...? 这样的结构。 直接用 must 提问也是可以的，但它们通常听起来更带感情色彩，或不那么中性。

Could / Might + subject + V1 / be + Ving?
Wh-word + might / could + subject + have + V3?
Should + subject + V1?
Do you think + subject + might / could + V1?

Could she be sleeping?
她会不会在睡觉？
What might have happened here?
这里可能发生了什么？
Should they be here by now?
他们现在应该到这里了吗？
Do you think he could have missed the email?
你觉得他会不会没看到那封邮件？

Speculation and Deduction 常见错误

❌ She must to be tired.
✅ She must be tired.
❌ He must has left.
✅ He must have left.
❌ They can’t have went home.
✅ They can’t have gone home.
❌ She mights be busy.
✅ She might be busy.
❌ He mustn’t have forgotten the meeting. (if you mean “that is impossible”)
✅ He can’t have forgotten the meeting.
❌ They should came by now.
✅ They should have come by now.

Speculation and Deduction 句子

She isn’t answering. She might be having a meeting.
她没接电话。她可能正在开会。
Look at those wet umbrellas. It must have rained.
看看那些湿雨伞。一定下过雨了。
This key can’t be the right one.
这把钥匙不可能是对的。
They may have taken the earlier bus.
他们可能乘坐了早一点的公交车。
The children are quiet. They must be sleeping.
孩子们很安静。他们一定是睡着了。
He could be working from home today.
他今天可能在家办公。
The guests should arrive around eight.
客人大约应该在八点左右到达。
You can’t have seen Anna there. She is abroad.
你不可能在那里见过安娜。她在国外。
There might not be enough chairs for everyone.
可能没有足够的椅子给每个人坐。
Do you think he might know the answer?
你觉得他可能知道答案吗？

Speculation and Deduction 例子

The office is dark, so they must have left already.
办公室里一片漆黑，所以他们肯定已经离开了。
Sarah might be waiting for us downstairs.
莎拉可能正在楼下等我们。
That sound could be coming from the kitchen.
那个声音可能是从厨房传来的。
He can’t be the new intern. He looks much older.
他不可能是新来的实习生。他看起来老得多。
The flight should land in about twenty minutes.
航班大约会在二十分钟后降落。
She may not have understood what you meant.
她可能没有理解你的意思。
They could have forgotten to lock the door.
他们可能忘了锁门。
It is unlikely to snow here in April.
这里四月下雪的可能性不大。
This problem was bound to happen after the update.
这个问题在更新后注定会发生。
Could he still be driving home?
他还在开车回家吗？

应用中提供的英语语法练习

Tenses

Future Simple Present Simple Present Perfect Present Continuous Past Simple Past Perfect Past Continuous Past Perfect Continuous Present Perfect Continuous Future Continuous Future Perfect Future Perfect Continuous Be going to

Conditionals

Second Conditional First Conditional Third Conditional Zero Conditional

Sentences

Relative Clauses Conjunctions Reported Speech There is / There are There was / There were

Verbs

Used to To be used to To get used to

Modals

Should or Shouldn't May or Might and Infinitive Modal Verbs Can / Can't Speculation and Deduction

Nouns and Articles

Countable and Uncountable Singular and Plural Nouns Uncountable and Plural