yòng mǎkèbǐ gěi biāoqiān biānhào.

The core pattern is:

用 + tool + 给 + target + verb

So here:

• 用马克笔 = using a marker
• 给标签 = to/for the labels
• 编号 = assign numbers / number them

A very natural way to understand the structure is:

Use a marker to number the labels.

It is also an imperative sentence (a command or instruction), so the subject 你 is omitted.

Not here. Although 给 often means to give, it also has other uses.

In this sentence, 给 marks the thing that receives the action. So 给标签编号 means something like:

• assign numbers to the labels
• number the labels

So 给 is working more like to/for/on than give.

This is very common in Chinese:

• 给文件命名 = name the file
• 给照片排序 = sort the photos
• 给孩子洗手 = wash the child’s hands

So in 给标签编号, the labels are the thing being acted on.

Here, 编号 is a verb, meaning to assign numbers or to number.

But 编号 can also be a noun meaning serial number / identification number.

For example:

• 给标签编号 = number the labels
  Here it is a verb.

• 这个产品的编号是A-17。
  = This product’s serial number is A-17.
  Here it is a noun.

So the same word can function in both ways, and context tells you which one it is.

Because 用马克笔 is most naturally placed before the main action.

Chinese usually puts the instrument/tool phrase before the verb phrase it modifies:

• 用马克笔给标签编号
• 用电脑处理数据
• 用剪刀剪纸

If you say 给标签用马克笔编号, it sounds awkward because the sentence flow is less natural.

So the standard order here is:

用 + tool + 给 + object + verb

用 introduces the means or tool used to do something. In English, it often corresponds to with or using.

So:

• 用马克笔 = with a marker / using a marker

Other examples:

• 用手机拍照 = take pictures with a phone
• 用中文回答 = answer in Chinese
• 用刀切 = cut with a knife

In your sentence, 用马克笔 tells you what tool should be used for the numbering.

马克笔 means marker pen or simply marker.

It is a common Chinese word, and it comes from the English word marker, adapted into Chinese sound-wise:

• 马克 sounds like part of marker
• 笔 means pen

Depending on context, similar words include:

• 记号笔 = marker / marking pen
• 油性笔 = permanent marker / oil-based marker

So 马克笔 is perfectly natural and common.

It can mean label or labels. Chinese nouns usually do not change form for singular and plural the way English nouns do.

So 标签 by itself can be:

• one label
• labels in general
• the labels, depending on context

If you want to make the number clearer, you can add words like:

• 一个标签 = one label
• 这些标签 = these labels
• 所有标签 = all the labels

In this sentence, 标签 is understood generically or collectively, so no extra word is necessary.

Because this is a command or instruction, and Chinese often leaves out the subject when it is obvious.

So:

• 用马克笔给标签编号。
• literally: Use a marker to number the labels.

The implied subject is usually 你:

• (你) 用马克笔给标签编号。

This is very common in instructions, manuals, classroom directions, and workplace speech.

If you want to make it more polite, you could say:

• 请用马克笔给标签编号。
  = Please use a marker to number the labels.

Because the sentence is giving an instruction, not describing a completed action.

A bare verb is normal for commands:

• 用马克笔给标签编号。
• 把门打开。
• 请坐。

If you add 了, the meaning changes and usually sounds like you are talking about completion or a changed situation, not giving a straightforward instruction.

So for a simple command, no 了 is needed.

Yes. These are related and natural, but they feel slightly different.

• 给标签编号
  More concise and a bit more formal or written.

• 给标签编个号
  More conversational. It feels like assign a number.

• 给标签编上号
  Emphasizes putting the number onto them / getting the numbering done.

So in instructions, 给标签编号 is very neat and standard.

Not always exactly.

编号 usually means assigning identifying numbers in an organized way. It often implies serial numbering, indexing, or systematic labeling.

So it is a bit more specific than simply:

• 写号码 = write a number
• 写数字 = write digits

For example:

• 给样品编号 = assign sample numbers
• 给文件编号 = assign file numbers
• 给房间编号 = number the rooms

So 编号 suggests not just writing any number, but giving an item its proper identifying number.

It works very well in written instructions.

用马克笔给标签编号。 sounds concise, practical, and natural in contexts like:

• workplace instructions
• packaging directions
• lab procedures
• classroom or office tasks

It is short, but not unnatural. Chinese often prefers this kind of compact style in instructions.