<p>了 - is not a verb complement. It's a realis maker, that is, by adding 了 at the end of the verb you render it to reality and not to a probabilistic-theoretical suggestion. So, in OP case, 了 renders possible situation to absolute truth.</p>

<p>你要是喜欢我就给你买
<em>If you like it, I would buy it for you.</em> (talking about possible situation)</p>

<p>你要是喜欢我就给你买了
<em>Your liking is enough for me to buy it.</em> 
or
<em>If you like it, consider the buyng as done (that is, real).</em>
(buying for sure, no way back!)</p>

CC BY-SA 4.0
2018-09-10T11:41:18.243Z
You overstate 买了. To express "buying for sure, no way back!", you have to add some words to emphasize: eg. 你要是喜欢, 我就【 一定 】给你买！
dan
CC BY-SA 4.0
2018-09-11T07:39:00.753Z
No, no... 就 is the emphasis here... 就买了= buying it for sure!  就 should be translated as a kind of "AND" but with a hint of "already" (IMHO).
买了 without any emphasis will just mean that "the act of buying will/have/is taking place, without any indication that it is/was/will be complete or reach the goal.
coobit
CC BY-SA 4.0
2018-09-11T09:01:28.060Z
就 actually isn't that strong here. With a normal tone, 我就给你买了 is like saying "*so I'm gonna go ahead to get it (bought) for you*".
dan
CC BY-SA 4.0
2018-09-11T09:08:58.483Z
Well, maybe not strong, but some power is posessed by 就. 就 - is kind of a consequential AND. *Something, something.......... AND I'll buy it.* Well, those are details.
coobit
CC BY-SA 4.0
2018-09-11T09:10:30.700Z
by the way. 谢谢 vs 谢谢了. How would one explain the difference? In "realis" maker view it's quiet easy. *thank you* vs *really thank you*
coobit
CC BY-SA 4.0
2018-09-11T09:18:24.780Z
Regarding 谢谢 vs 谢谢了, I don't see much difference. Both can be interpreted as "*Thanks!*". In spoken, we frequently say 谢谢，谢了 or just 谢（especially in typing). I will take them all in the same degree of thankfulness, just like "*Thanks!*".
dan
CC BY-SA 4.0
2018-09-10T08:09:18.610Z
2018-09-10T08:20:18.407Z
2018-09-10T08:20:18.407Z
coobit
<p>I think the key is the usage of 了. In my opinion, 了 here works like a <strong>result complement</strong>,  which indicates <strong>the status changed</strong>. </p>

<p>Semantically, they(with or without 了) denote the same meaning.</p>

<p>我买 vs 我买了: </p>

<p>我买 is like saying "<em>I will buy</em>" in English.</p>

<p>我买了 is like "<em>I will have/get it bought</em>. The status changed from <em>not bought</em> to <em>bought</em>.</p>

<p>Another example is 我走 vs 我走了. 我走 is <em>I am going.</em> 我走了 is <em>I will be gone.</em> The status changed from <em>staying here</em> to <em>be gone</em>.</p>

<p>Hope this could help you out.</p>

CC BY-SA 4.0
2018-09-07T21:29:42.980Z
This should be the accepted answer imho.
Aryaman
CC BY-SA 4.0
2018-09-10T08:23:58.163Z
我买 differs from  我买了 in a complete different sence.  我买了 - is a situation which took, taking, will take place in reality, as a fact. But  我买 is a probability, dream, habitual situation.  我买  I usually buy, I might buy, The buying is a habit of mine... there are may translation to this pair.
coobit
CC BY-SA 4.0
2018-09-06T23:17:00.493Z
2018-09-06T23:39:22.417Z
2018-09-06T23:39:22.417Z
dan
<p>It's there for emphasis purpose, the sentence will have the same meaning even without 了. If translated to English, it would be something like this:</p>

<hr>

<p>你要是喜欢我就给你买了<br>
If you like it, I'll <strong>just</strong> buy it.</p>

<p>你要是喜欢我就给你买<br>
If you like it, I'll buy it.</p>

<hr>

CC BY-SA 4.0
2018-09-06T09:19:55.707Z
2018-09-06T09:19:55.707Z
Khahoe Tan
<p>了【le】
 (aux.v)  used after the verb or adj. to indicate completion
 (int)  1.To strong affirmation
        2.To promote or discourage</p>

CC BY-SA 4.0
2018-09-07T10:22:22.710Z
2018-09-07T10:22:22.710Z
taoger
<p>Is it an aspect marker? Is it a specific grammatical construction with 就 or 要是? Is it there just for emphasis? I can't work it out...</p>

<particles>
What's the role of 了 in this sentence: 你要是喜欢我就给你买了
# What's the role of 了 in this sentence: 你要是喜欢我就给你买了

(Asked by: username_0 on 2018-09-06)

Is it an aspect marker? Is it a specific grammatical construction with 就 or 要是? Is it there just for emphasis? I can't work it out...

**Tags:** particles


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## 4 answers

### Answer by username_1 on 2018-09-10. Score: 1 | Accepted answer

了 - is not a verb complement. It's a realis maker, that is, by adding 了 at the end of the verb you render it to reality and not to a probabilistic-theoretical suggestion. So, in OP case, 了 renders possible situation to absolute truth.

你要是喜欢我就给你买
*If you like it, I would buy it for you.* (talking about possible situation)

你要是喜欢我就给你买了
*Your liking is enough for me to buy it.*
or
*If you like it, consider the buyng as done (that is, real).*
(buying for sure, no way back!)

> **Comments:**
> **username_2**: You overstate 买了. To express "buying for sure, no way back!", you have to add some words to emphasize: eg. 你要是喜欢, 我就【 一定 】给你买！  
> **username_1**: No, no... 就 is the emphasis here... 就买了= buying it for sure!  就 should be translated as a kind of "AND" but with a hint of "already" (IMHO). 买了 without any emphasis will just mean that "the act of buying will/have/is taking place, without any indication that it is/was/will be complete or reach the goal.  
> **username_2**: 就 actually isn't that strong here. With a normal tone, 我就给你买了 is like saying "*so I'm gonna go ahead to get it (bought) for you*".  
> **username_1**: Well, maybe not strong, but some power is posessed by 就. 就 - is kind of a consequential AND. *Something, something.......... AND I'll buy it.* Well, those are details.  
> **username_1**: by the way. 谢谢 vs 谢谢了. How would one explain the difference? In "realis" maker view it's quiet easy. *thank you* vs *really thank you*  
> **username_2**: Regarding 谢谢 vs 谢谢了, I don't see much difference. Both can be interpreted as "*Thanks!*". In spoken, we frequently say 谢谢，谢了 or just 谢（especially in typing). I will take them all in the same degree of thankfulness, just like "*Thanks!*".  

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### Answer by username_2 on 2018-09-06. Score: 6

I think the key is the usage of 了. In my opinion, 了 here works like a **result complement**, which indicates **the status changed**.

Semantically, they(with or without 了) denote the same meaning.

我买 vs 我买了:

我买 is like saying "*I will buy*" in English.

我买了 is like "*I will have/get it bought*. The status changed from *not bought* to *bought*.

Another example is 我走 vs 我走了. 我走 is *I am going.* 我走了 is *I will be gone.* The status changed from *staying here* to *be gone*.

Hope this could help you out.

> **Comments:**
> **username_3**: This should be the accepted answer imho.  
> **username_1**: 我买 differs from  我买了 in a complete different sence.  我买了 - is a situation which took, taking, will take place in reality, as a fact. But  我买 is a probability, dream, habitual situation.  我买  I usually buy, I might buy, The buying is a habit of mine... there are may translation to this pair.  

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### Answer by username_4 on 2018-09-06. Score: 2

It's there for emphasis purpose, the sentence will have the same meaning even without 了. If translated to English, it would be something like this:

---

你要是喜欢我就给你买了  
If you like it, I'll **just** buy it.

你要是喜欢我就给你买  
If you like it, I'll buy it.

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### Answer by username_5 on 2018-09-07. Score: 1

了【le】
(aux.v) used after the verb or adj. to indicate completion
(int) 1.To strong affirmation
2.To promote or discourage


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