B1 noun Neutral

理由

/li˨˩˦ i̯oʊ̯˧˥/

A justification or explanation for something; the motive or basis for an action or belief.

Examples

3 of 5
1

我没有任何理由怀疑他。

I have no reason to doubt him.

2

请陈述你支持这个观点的理由。

Please state the reasons why you support this view.

3

这并不是拒绝合作的理由。

This is not a reason to refuse cooperation.

Word Family

Noun
理由
Adjective
有理由的
💡

Memory Tip

Li (Logic) + You (Source) = The logical source of an action.

Quick Quiz

你辞职的____是什么?

Correct!

The correct answer is: 理由

Examples

1

我没有任何理由怀疑他。

informal

I have no reason to doubt him.

2

请陈述你支持这个观点的理由。

academic

Please state the reasons why you support this view.

3

这并不是拒绝合作的理由。

business

This is not a reason to refuse cooperation.

4

你有充分的理由感到自豪。

everyday

You have every reason to be proud.

5

法官要求提供更多的理由。

formal

The judge requested more justifications.

Word Family

Noun
理由
Adjective
有理由的

Common Collocations

充足理由 sufficient reason
理由正当 legitimate reason
毫无理由 without any reason
根本理由 fundamental reason
陈述理由 to state reasons

Common Phrases

理由如下

the reasons are as follows

找理由

to look for an excuse

以此为理由

using this as a reason

Often Confused With

理由 vs 原因

原因 usually refers to the objective cause of an event, while 理由 is more about the subjective justification or argument.

📝

Usage Notes

Essential for IELTS Writing Task 2 to justify arguments.

⚠️

Common Mistakes

Do not use 理由 for physical causes (e.g., 'the reason for the rain' should be 原因).

💡

Memory Tip

Li (Logic) + You (Source) = The logical source of an action.

📖

Word Origin

From 'Li' (principle/reason) and 'You' (cause/origin).

Grammar Patterns

有/没有...理由 ...的理由是...

Quick Quiz

你辞职的____是什么?

Correct!

The correct answer is: 理由

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