<p>那时/那时候 - formal, a long period of time. Whichever one you choose depends on how fast-paced you want your narration. 那时，我开始对数学感兴趣 makes the most sense because your growing interest in math sounds like a long-term process.</p>
<p>当时 - formal, a very short period of time. Example: 当时，我吓坏了。</p>
<p>那会儿 - colloquial, any length of time. Example: 那会儿，我在火车上只吃方便面。</p>
<p>那阵子 - colloquial, a very long period of time. Example: 那阵子，我特别无聊。</p>

CC BY-SA 4.0
2020-06-23T07:24:24.223Z
2020-06-23T07:24:24.223Z
jruan
<p>You can try:</p>

<p>At that time, I started to get interested in maths.<br>
那时我开始对数学感兴趣。</p>

<p>also</p>

<p>从那时起 ...</p>

CC BY-SA 4.0
2020-04-13T08:12:00.353Z
2020-04-13T08:12:00.353Z
Pedroski
<p>"那时" is shorten of "那时候" , is same meaning of "當時"、"那會兒" = "At that time"</p>

<p>"那陣子" is similar to "during that time" </p>

<p>當時我嚇呆了= 那時(候)我嚇呆了 = "I was shocked at that time!"</p>

CC BY-SA 4.0
2020-05-27T01:45:09.633Z
2020-05-27T01:45:09.633Z
高鵬翔
<p>那时, 那时候, 当时 is a point of time or time period that located times ago.</p>

<p>那阵子 is a time period that located times ago.</p>

<p>阵子 indicate period of times so 那阵子 specifically means a time period that located times ago.</p>

CC BY-SA 4.0
2020-04-12T12:17:17.237Z
2020-04-12T12:17:17.237Z
000
<p>I was trying to say &quot;at that time I started to be interested in maths&quot;. I translated it as:</p>
<blockquote>
<p>当时我开始对数学感兴趣.</p>
</blockquote>
<p>Then I saw some other expressions to say &quot;at that time&quot;: 那时，那时候，那会儿，那阵子.</p>
<p>What are the differences between those? I suppose 那会儿 is &quot;at that moment&quot; instead of &quot;at that time&quot; but what is the difference with 那时 and 那时候? And what is the meaning of 那阵子?</p>
<p>Thanks.</p>

<grammar>
Difference between 那时，那时候，当时，那会儿，那阵子
# Difference between 那时，那时候，当时，那会儿，那阵子

(Asked by: username_0 on 2020-04-12)

I was trying to say "at that time I started to be interested in maths". I translated it as:

> 当时我开始对数学感兴趣.

Then I saw some other expressions to say "at that time": 那时，那时候，那会儿，那阵子.

What are the differences between those? I suppose 那会儿 is "at that moment" instead of "at that time" but what is the difference with 那时 and 那时候? And what is the meaning of 那阵子?

Thanks.

**Tags:** grammar

---

## 4 answers

### Answer by username_1 on 2020-06-23. Score: 1

那时/那时候 - formal, a long period of time. Whichever one you choose depends on how fast-paced you want your narration. 那时，我开始对数学感兴趣 makes the most sense because your growing interest in math sounds like a long-term process.

当时 - formal, a very short period of time. Example: 当时，我吓坏了。

那会儿 - colloquial, any length of time. Example: 那会儿，我在火车上只吃方便面。

那阵子 - colloquial, a very long period of time. Example: 那阵子，我特别无聊。


---

### Answer by username_2 on 2020-04-13. Score: 0

You can try:

At that time, I started to get interested in maths.  
那时我开始对数学感兴趣。

also

从那时起 ...


---

### Answer by username_3 on 2020-05-27. Score: 0

"那时" is shorten of "那时候" , is same meaning of "當時"、"那會兒" = "At that time"

"那陣子" is similar to "during that time"

當時我嚇呆了= 那時(候)我嚇呆了 = "I was shocked at that time!"


---

### Answer by username_4 on 2020-04-12. Score: 0

那时, 那时候, 当时 is a point of time or time period that located times ago.

那阵子 is a time period that located times ago.

阵子 indicate period of times so 那阵子 specifically means a time period that located times ago.


---

