短暂的周末

上星期五我加班到了凌晨二点两点。
我没看了世界杯。 因为我困了。
星期六我去赶集了。看到世界杯了三点。（三点看世界杯了)or(看世界杯看到了三点） 
星期日我去明洞买完东西以后，我见个朋友，然后一起喝酒了

Since there has already been a good correction sine 8 mins ago, maybe I can just provide you some tips in how to write correct Chinese, I mean, the way in which you can avoid making the same mistakes again.

1. 两点。 yeah, that's our habit, nothing else to say;

2.Acutally “我没看了世界杯” is also a correct one, and its meaning is a little different from “我没看世界杯”.

In this case, 了 should be pronounced as liao （in the third tone) , but not le.

It means the same as “我没看成世界杯”.

It means you wanted or planned to 看世界杯， but because of something unexpected, you didn't manage to watch it. The reasons can be: Your boss called you and gave you an urgent task\ your TV didn't work\ someone is illed and you must go to the hospital at that time......

Here, “你加班加到了凌晨两点，and you are too sleepy to watch the FIFA world cup” can also be the reason. So,“我没看了世界杯”is also a correct sentence.

But I guess you only wanted to use 了 to show the past tense of this sentence, and you thought it should be pronounced as "le". That's wrong. Because 没 has already shown the past tense.The sentense should just be: 我没看世界杯。

3.我看世界杯看到了三点。“看到了三点” is the complement of this sentence. In Chinese we call it 补语。补：补充。This element is used to 将句子补充完整。Here, the complement 补充的是：the time that you watched untill. In a way we can regard it as a complement that shows the result.

Anyway, it's a complement. In Chinese we put the complements at the end of ther sentence, I mean, be behind the main sentence ——subject and predicate.

Actually your first sentence "上星期五我加班到了凌晨二点。" is a correct one.

But in my opinion “加班加到了凌晨两点” is a little better than “加班到了凌晨两点”

“看世界杯看到了三点” is a little better than “看世界杯到了三点”

Maybe that's just a language habit of me and the people around me.

You can ignore it.

4.星期日我去明洞买东西以后我和朋友一起喝酒了

我 should be left out since you have already written one.

Haha you are a korean and I am a Chinese, but we are discussing language in English! haha that's both hard for you and me~Anyway I hope what I wrote is mostly right and can be understood by you!

Actually I am also learning your language, korean! heihei

Come on! Hope you can make progress in Chinese!

短暂的周末

上星期五我加班到了凌晨二点。
我没看世界杯。 因为我困了。
星期六我去赶集了。看世界杯到三点。
星期日我去明洞买东西以后我见朋友一起喝酒了

短暂的周末

上星期五我加班到了凌晨两点。
我没看世界杯。 因为我困了。
星期六我去赶集了。我看世界杯看到三点。
星期日我去明洞买东西，之后我见了朋友，和他们喝了酒。

短暂的周末

上星期五我加班到了凌晨二点（我们习惯说“两点”）。
我没看了世界杯。， 因为我困了。
星期六我去赶集了。晚上我看到世界杯看到了三点。
星期日我去明洞买东西，以后之后我见和朋友一起喝酒去了