chuwoseo janggabi piryohaesseoyo.

추워서 comes from the dictionary form 춥다 meaning to be cold.

It is formed like this:

• 춥다
• stem: 춥-
• add -어서 for because / so
• because 춥다 is a ㅂ-irregular adjective, the ㅂ changes to 우
• so 춥어서 becomes 추워서

So 추워서 means because it was cold or since it was cold.

This is because 춥다 follows the ㅂ irregular pattern.

With many adjectives ending in ㅂ, the ㅂ changes to 우 before a vowel-based ending:

• 춥다 → 추워요
• 덥다 → 더워요
• 어렵다 → 어려워요

So when -어서 is added, the correct form is 추워서, not 춥어서.

Here, -서 connects two ideas and shows reason or cause.

So the sentence structure is:

• 추워서 = because it was cold
• 장갑이 필요했어요 = gloves were needed / I needed gloves

Together, it means that the second part happened because of the first part.

A very literal breakdown is:

• It was cold, so gloves were necessary

This is a very common question.

In Korean, when two clauses are connected, the tense is often made clear by the final verb, and the earlier clause can stay in a simpler form.

So:

• 추워서 장갑이 필요했어요 naturally means Because it was cold, I needed gloves

Even though 추워서 does not visibly show past tense, the past meaning is understood from 필요했어요.

A form like 추웠어서 is usually not the natural choice here. Korean much more often uses 추워서 and lets the past meaning come from the full sentence.

Because 필요하다 works differently from English to need.

In English, we say:

• I need gloves

But in Korean, the structure is closer to:

• Gloves are necessary
• 장갑이 필요하다

So the thing that is needed is often marked with 이/가, not 을/를.

That is why:

• 장갑이 필요했어요 = gloves were needed / I needed gloves

This is one of the most important patterns to get used to with 필요하다.

Yes. Korean often leaves out the subject when it is obvious from context.

So this sentence could imply:

• 저는 추워서 장갑이 필요했어요
• 제가 추워서 장갑이 필요했어요

But Korean usually does not say 저는 or 제가 unless it is needed for emphasis or clarity.

That means the sentence can naturally be understood as:

• I needed gloves because it was cold
• or, depending on context, we/he/she needed gloves because it was cold

It comes from 필요하다, which means to be necessary or to need.

Formation:

• 필요하다 = dictionary form
• 필요해요 = present polite
• 필요했어요 = past polite

So 필요했어요 means:

• was necessary
• needed

Even though English often uses an action verb like need, Korean is using a form that is more like was necessary.

필요했어요 is in the polite -어요 style.

It is:

• polite
• natural in everyday conversation
• appropriate with strangers, coworkers, teachers, and many normal situations

It is less formal than 필요했습니다, but more polite than 필요했어.

So this sentence sounds polite and natural in regular spoken Korean.

Korean nouns usually do not have a built-in singular/plural distinction the way English does.

So 장갑 can mean:

• a glove
• gloves
• a pair of gloves

In real context, people would usually understand 장갑 here as gloves, since that is the natural thing someone needs when it is cold.

If needed, Korean can make plurality clearer with 들, but that is often unnecessary.

Yes, that is possible, but the nuance is a little different.

• 추워서 sounds like a natural cause-and-result connection: It was cold, so I needed gloves
• 추우니까 can sound more like the speaker is giving a reason, explanation, or justification

In this sentence, 추워서 장갑이 필요했어요 sounds very natural.

Also, -서 is especially common for straightforward cause-and-effect situations like this one.

The sentence puts the reason first and the result second, which is very common in Korean:

• 추워서 = because it was cold
• 장갑이 필요했어요 = gloves were needed

So the order is:

• Because it was cold, gloves were needed

This is a very natural Korean way to build a sentence. Korean often places background information, cause, or setting before the main point.