<p>When at the end of a sentence, 了 has two functions/meanings:</p>
<ol>
<li><p>to indicate a change of state - something has been completed. 長大了, 變老了, 水位降低了...</p>
</li>
<li><p>to inform the beginning of an action.</p>
</li>
</ol>
<ul>
<li><p>我得把今天的练习做了。(I must start to do today's homework)</p>
</li>
<li><p>我该回去了。(I shall go home now)</p>
</li>
<li><p>您不要出来了 = 您不要出来 (You do not need to come out), the former way is more polite. Also 您不<strong>用</strong>出来 is often used too.</p>
</li>
<li></li>
</ul>

CC BY-SA 4.0
2022-04-12T14:56:30.763Z
2022-04-12T14:56:30.763Z
r13
<p>The word 了 usually doesn't change the meaning of the text.</p>
<p><strong>1. The word 了 is often used after verbs and adjectives to mean that something has finished. 2. Also used at the end of a sentence or a stop which means that something will or has already changed</strong></p>
<p>Examples:</p>
<ol>
<li>(1) 我吃完饭了 —— I am done eating （吃 is a verb and it means something has finished）</li>
<li>(1) 水位已经降了两米 —— The water level has been lowered by two meters （降 is a verb）</li>
<li>(2) 春天要来了——Spring is coming (The season will change soon)</li>
<li>(2) 天黑了——It's dark already (already changed)</li>
</ol>

CC BY-SA 4.0
2022-04-12T11:39:06.787Z
2022-04-12T12:00:14.217Z
2022-04-12T12:00:14.217Z
H_Henry
<p>I wonder what's the purpose of 了 in combination of &quot;must, have to&quot; verbs. Here are some examples:</p>
<ol>
<li><p>我得把今天的练习做了。
I know without 了 it would mean &quot;I must do today's exercises&quot;.
But I don't know what changes does the particle 了 bring here? Is this 了1 or 了2?</p>
</li>
<li><p>我该回去了。
Without 了 it would mean &quot;I must return&quot;. But I don't know how to translate this sentence with 了.</p>
</li>
<li><p>您不要出来了。
Without 了 it would mean &quot;You shouldn't come out&quot;. What's the difference between the sentence above with &quot;您不要出来&quot;.</p>
</li>
</ol>

CC BY-SA 4.0
2022-04-12T10:17:33.117Z
不要 = don't; 该 = should; 得 = have to; 了 can be a particle that indicates the verb is completed  but it is a final particle in these sentences
Tang Ho
<grammar>
了 with verbs like 不要，该，得
# 了 with verbs like 不要，该，得

(Asked by: username_0 on 2022-04-12)

I wonder what's the purpose of 了 in combination of "must, have to" verbs. Here are some examples:

1. 我得把今天的练习做了。
   I know without 了 it would mean "I must do today's exercises".
   But I don't know what changes does the particle 了 bring here? Is this 了1 or 了2?
2. 我该回去了。
   Without 了 it would mean "I must return". But I don't know how to translate this sentence with 了.
3. 您不要出来了。
   Without 了 it would mean "You shouldn't come out". What's the difference between the sentence above with "您不要出来".

**Tags:** grammar

> **Comments:**
> **username_1**: 不要 = don't; 该 = should; 得 = have to; 了 can be a particle that indicates the verb is completed  but it is a final particle in these sentences  

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## 2 answers

### Answer by username_2 on 2022-04-12. Score: 1

When at the end of a sentence, 了 has two functions/meanings:

1. to indicate a change of state - something has been completed. 長大了, 變老了, 水位降低了...
2. to inform the beginning of an action.

* 我得把今天的练习做了。(I must start to do today's homework)
* 我该回去了。(I shall go home now)
* 您不要出来了 = 您不要出来 (You do not need to come out), the former way is more polite. Also 您不**用**出来 is often used too.


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### Answer by username_3 on 2022-04-12. Score: 1

The word 了 usually doesn't change the meaning of the text.

**1. The word 了 is often used after verbs and adjectives to mean that something has finished. 2. Also used at the end of a sentence or a stop which means that something will or has already changed**

Examples:

1. (1) 我吃完饭了 —— I am done eating （吃 is a verb and it means something has finished）
2. (1) 水位已经降了两米 —— The water level has been lowered by two meters （降 is a verb）
3. (2) 春天要来了——Spring is coming (The season will change soon)
4. (2) 天黑了——It's dark already (already changed)


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