wǒ xiǎng yùdìng dānrénjiān.

Chinese word order here is very straightforward:

• 我 = subject
• 想 = want / would like
• 预订 = reserve / book
• 单人间 = single room

So the pattern is:

Subject + 想 + Verb + Object

This is similar to English I want to book a single room, except Chinese does not need a separate word for to before book.

In Chinese, verbs often come directly after words like 想, 要, or 能 without an extra word like English to.

So:

• 我想预订单人间。 literally follows the pattern
• I want book single room

That is completely normal in Chinese.
You do not say something like 我想去预订 unless you specifically mean go and book.

想 can mean different things depending on context:

• to think
• to want to
• to miss someone

In this sentence, 想 means would like to / want to.

So although learners often first meet 想 as think, here it is expressing intention or desire.

Compare:

• 我想一下。 = Let me think for a moment.
• 我想预订单人间。 = I’d like to book a single room.

Both can relate to wanting something, but the tone is different.

• 想 is usually softer and more polite: would like to
• 要 can sound more direct: want / need

So in a service situation like booking a hotel room, 我想预订单人间 sounds natural and polite.

If you say:

• 我要预订单人间。

it is still understandable, but it can sound more blunt, like I want to book a single room.

预订 means to reserve / to book in advance.

• 预 carries the idea of in advance
• 订 means to order / to book

In everyday speech, many people simply say 订:

• 我想订单人间。

That is shorter and very common.

预订 sounds a little more formal or explicit.

单人间 literally breaks down like this:

• 单人 = single person
• 间 = room

So 单人间 means single room.

It usually refers to a room intended for one person. In real hotel situations, the exact meaning may depend on the hotel: sometimes it means one bed, sometimes simply a room for one guest.

You may also hear:

• 单人房 = single room
• 单间 = single room / one room / studio-like room, depending on context

Good question. Chinese often does not need a number word like one/a when the meaning is already clear.

So:

• 我想预订单人间。 = I’d like to book a single room.

This is perfectly natural.

If you want to emphasize the number, you can say:

• 我想预订一间单人间。

Here:

• 一 = one
• 间 = measure word for rooms

That version is also correct, and sometimes more explicit.

Because 间 has two related uses.

1. As part of a noun:

   • 单人间 = single room

2. As a measure word:

   • 一间房 = one room
   • 一间单人间 = one single room

This can be confusing at first, but it is normal in Chinese.
In 单人间, the final 间 is part of the room name itself.
In 一间单人间, the first 间 is the measure word.

In some contexts, yes.

Chinese often drops the subject when it is obvious from the situation. So if you are already speaking to a hotel receptionist, saying:

• 想预订单人间。

may be understood.

However, for learners, 我想预订单人间。 is safer and more complete. It sounds natural and clear.

Yes, it is polite enough in many situations, especially because 想 softens the sentence.

If you want to sound even more polite, you could say:

• 我想预订一间单人间。
• 我想订一间单人间。
• 我想预订一间单人间，可以吗？ = I’d like to book a single room, is that okay?
• 您好，我想预订一间单人间。 = Hello, I’d like to book a single room.

Adding 您好 or 可以吗 makes it sound more courteous.

Because this sentence is about intention, not completed action.

• 我想预订单人间。 = you want to book it
• not that you have already booked it

If you say 了, the meaning changes depending on context, and it may sound like something has already happened or is changing state.

For a simple booking request, no particle is needed.

The pinyin is:

• 我 — wǒ
• 想 — xiǎng
• 预订 — yùdìng
• 单人间 — dānrénjiān

Tone pattern:

• wǒ = 3rd tone
• xiǎng = 3rd tone
• yù = 4th tone
• dìng = 4th tone
• dān = 1st tone
• rén = 2nd tone
• jiān = 1st tone

A few pronunciation tips:

• x in xiǎng is not like English x; it is a soft sound made with the tongue closer to the front of the mouth.
• ü in yù is the ü sound, not a plain English oo.
• rén has a Mandarin r, which is not exactly like English r.

Yes, a native speaker could say it, and it is correct.

That said, in real life, people often use slightly more conversational versions, such as:

• 我想订一间单人间。
• 我想订个单人间。
• 我想预订一间单人房。

So your sentence is good Chinese, but everyday spoken Chinese may be a little shorter or less formal.

Sometimes in casual speech, yes:

• 我想订个单人间。

This is very common in spoken Chinese.

But 间 is the more precise measure word for rooms, so:

• 一间单人间

is more standard and textbook-like.

So both can appear, but they feel slightly different:

• 个 = casual, general-purpose
• 间 = more specific and proper for rooms

You can keep the same pattern and just replace 单人间.

For example:

• 我想预订双人间。 = I’d like to book a double room.

So the sentence pattern is very reusable:

• 我想预订 + room type

Examples:

• 我想预订标准间。 = I’d like to book a standard room.
• 我想预订大床房。 = I’d like to book a room with a large bed.
• 我想预订一间套房。 = I’d like to book a suite.