jungyohan memoreul chaeksang wie dugo wasseoyo.

It literally means put/left it somewhere and came.

In this sentence, 두고 왔어요 is best understood as left behind:

• 두다 = to put, place, leave
• -고 = and
• 오다 / 왔어요 = to come / came

So the idea is:

• I put the important memo on the desk and came
• which naturally becomes I left the important memo on the desk

This structure often implies that the speaker is now somewhere else.

Korean often links actions together very naturally.

Here:

• 두고 = leaving/placing something
• 왔어요 = then came

So the sentence describes a sequence:

1. the speaker left the memo on the desk
2. then came away from that place

That is why 두고 왔어요 sounds more vivid than simply saying 두었어요. It emphasizes that the memo was left there and the speaker is now elsewhere.

를 is the object marker.

It marks 메모 as the thing being acted on:

• 메모를 두고 왔어요 = left the memo behind

So:

• 메모 = memo
• 메모를 = the memo, as the object of 두다

English does not have an exact equivalent, so it is often easiest to think of 를/을 as showing what the verb affects.

책상 위에 means on top of the desk, so it is more specific.

Breakdown:

• 책상 = desk
• 위 = top, upper side
• 에 = location marker

So:

• 책상에 = at the desk / on the desk, depending on context
• 책상 위에 = on top of the desk

If you want to clearly say the memo was physically on the desk surface, 책상 위에 is the most precise expression.

Here, 에 marks the place where something is put or exists.

With 두다, 에 often marks the location where something is placed:

• 책상 위에 두다 = to put it on the desk

So in this sentence, 에 tells you where the memo was left.

Because 중요하다 must change form before it can directly describe a noun.

중요하다 means to be important.
When a descriptive verb modifies a noun, it becomes:

• 중요한 = important

So:

• 중요하다 = to be important
• 중요한 메모 = an important memo

This is similar to how Korean adjectives often work like verbs and need a special modifier form before nouns.

No, 메모 is a loanword, from English memo.

Korean uses many loanwords, especially for modern or everyday items.
So 메모 is a very common and natural word in Korean.

Depending on context, it can mean:

• memo
• note
• written reminder

Yes, 놓고 왔어요 is also possible in many situations.

Very generally:

• 두다 = to put, leave, keep
• 놓다 = to put, set down

In many everyday sentences, they overlap. But 두다 often feels especially natural when the idea is leaving something somewhere or keeping it there.

So:

• 책상 위에 두고 왔어요 = I left it on the desk
• 책상 위에 놓고 왔어요 = I set it on the desk and came

Both can work, but 두고 왔어요 often matches the idea of left behind especially well.

Not automatically, but it often suggests that possibility in context.

The sentence itself just says:

• I left the important memo on the desk

Depending on the situation, it might mean:

• the speaker accidentally forgot it there
• the speaker intentionally left it there
• the speaker realizes now that it is not with them

In real conversation, listeners often understand a nuance like Oops, I left it there unless the context says otherwise.

왔어요 is the polite informal style, also called the -아요/어요 style.

It is:

• polite
• natural in everyday conversation
• very common in speech

The dictionary form is:

• 오다 = to come

Past polite form:

• 왔어요 = came

So the whole sentence is polite and conversational, not formal like 왔습니다 and not casual like 왔어.

The basic structure is:

• 중요한 메모를 = the important memo
• 책상 위에 = on the desk
• 두고 왔어요 = left it there and came

So the overall pattern is:

object + location + verb

This is very common in Korean. Also, the subject is omitted because it is understood from context. In English, you would usually say I left an important memo on the desk, but in Korean the I does not need to be stated unless needed for emphasis.

The full dictionary-form expression is 두고 오다.

Breakdown:

• 두다 = to leave/place
• -고 = and
• 오다 = to come

Past polite:

• 두고 왔어요

You can think of 두고 오다 as a set expression meaning:

• to leave something somewhere and come away
• often simply to leave behind

Sometimes yes, depending on context, but I left an important memo on the desk is usually the most direct translation.

Because 두고 왔어요 includes the idea of coming away after leaving it, it often feels a little more specific than a simple English present perfect.

Good natural translations include:

• I left an important memo on the desk.
• I left the important memo on the desk.
• I left an important note on the desk.

If the context is about realizing it is still there, English might also say:

• I left my important memo on the desk.