Hiện bưu điện đang đóng cửa.

Hiện means currently, at present, or right now. It sets the time frame for the whole sentence.

So Hiện bưu điện đang đóng cửa means something like:

• Currently, the post office is closed
• At the moment, the post office is closed

In everyday speech, Vietnamese speakers might also say bây giờ, hiện giờ, or hiện nay depending on the context.

Đang is a marker that often shows an action or state is happening at the present time.

In this sentence, đang helps emphasize that the post office is in that state now.

• Bưu điện đóng cửa = the post office is closed / closes
• Bưu điện đang đóng cửa = the post office is closed right now / is currently closed

So đang makes the sentence feel more clearly tied to the present moment.

No separate word is needed here.

Vietnamese often does not use a word equivalent to English is/are in sentences like this. The meaning is understood from context and word order.

So:

• bưu điện = post office
• đang đóng cửa = is closed / is in a closed state right now

English needs is, but Vietnamese does not.

Yes, literally đóng cửa means close the door or shut the door.

But very often, as a fixed expression, it means a shop, office, bank, etc. is closed for business.

Examples:

• Cửa hàng đóng cửa. = The shop is closed.
• Ngân hàng đang đóng cửa. = The bank is currently closed.

So in your sentence, đóng cửa does not mean the post office is physically in the act of shutting a door. It means the post office is not open.

Because hiện is a time adverb, and time expressions are often placed near the beginning of the sentence in Vietnamese.

So this structure is natural:

• Hiện bưu điện đang đóng cửa.

But these are also possible:

• Bưu điện hiện đang đóng cửa.
• Hiện nay bưu điện đang đóng cửa.

All are understandable. Putting hiện first gives a slightly more formal or written feel.

Bưu điện means post office.

It is a compound noun:

• bưu relates to mail/post
• điện historically relates to telegraph/communications in this kind of compound

You do not normally split it when learning it as basic vocabulary. It is best treated as one unit: bưu điện = post office.

Yes, often you can.

1. Without hiện

• Bưu điện đang đóng cửa. This still means The post office is currently closed.

2. Without đang

• Hiện bưu điện đóng cửa. This can still be understood, but it may sound a bit less natural in some contexts.

3. Without both

• Bưu điện đóng cửa. This can mean The post office is closed or The post office closes, depending on context.

So if you want to be very clear about right now, using đang is helpful.

Usually it means the post office is closed at the moment, not necessarily permanently.

The sentence describes the current situation. It does not by itself say whether the closure is temporary or permanent.

If you wanted to say it had shut down for good, Vietnamese would usually use clearer wording, such as:

• Bưu điện đã đóng cửa rồi. = The post office has shut down / closed.
• Bưu điện ngừng hoạt động. = The post office stopped operating.

So Hiện bưu điện đang đóng cửa normally sounds like It is closed right now.

Yes, it is natural and correct, especially in a neutral or slightly formal style.

A few common alternatives are:

• Bưu điện hiện đang đóng cửa.
• Hiện nay bưu điện đang đóng cửa.
• Bây giờ bưu điện đang đóng cửa.

Among these:

• hiện / hiện nay feels a bit more formal or written
• bây giờ feels more conversational

So your sentence is good, but it leans a little toward standard written or announcement-style Vietnamese.

In some contexts, yes, đang + verb can mean is doing something right now.

But with a place like bưu điện, Vietnamese speakers will normally understand đang đóng cửa as being closed or currently not open, not literally in the process of shutting its door.

Context matters:

• Nhân viên đang đóng cửa. = The staff are closing up / shutting the doors.
• Bưu điện đang đóng cửa. = The post office is currently closed.

So the subject helps determine the meaning.

A helpful breakdown is:

• Hiện = currently
• bưu điện = post office
• đang = currently / in progress
• đóng cửa = closed / shut

So the sentence is roughly:

Currently + post office + is currently in a closed state

A more natural English rendering is simply:

The post office is currently closed.

Vietnamese word order often looks more direct than English, and you usually do not need to insert a verb like is when translating piece by piece.