Nhân viên có một biểu mẫu.

This sentence follows the very common Vietnamese word order:

• Nhân viên = subject
• có = verb
• một biểu mẫu = object

So it is simply subject + verb + object, like English The employee has a form.

Here, có means to have.

So in this sentence, it shows possession: the employee has something.

A useful thing to know is that có can also mean there is / there are in other contexts. For example:

• Có một biểu mẫu. = There is a form.

But once you put a subject before it, as in Nhân viên có..., it is usually understood as has.

Vietnamese does not use articles the way English does. There is no direct equivalent that must appear before nouns in every sentence.

So nhân viên can mean things like:

• an employee
• the employee
• employee
• sometimes even employees in a general sense

The exact meaning depends on context.

By itself, nhân viên does not show singular or plural. Vietnamese nouns usually do not change form for number.

So nhân viên can be:

• one employee
• employees in general
• the employee already known from context

If you want to make plural clearer, you can use words like:

• các nhân viên = the employees
• những nhân viên = some employees

If you want to say each employee has a form, a very natural sentence is:

• Mỗi nhân viên có một biểu mẫu.

Một literally means one, but it is also often used like English a/an.

In this sentence, một biểu mẫu most naturally means a form.

If you stress một, it can sound more like the number one:

• Nhân viên có một biểu mẫu, không phải hai.
  = The employee has one form, not two.

So the difference is often about emphasis and context.

This is about classifiers.

Vietnamese often uses classifiers such as cái, con, quyển, and so on. But they are not always required.

With a formal noun like biểu mẫu, it is very natural to say:

• một biểu mẫu

Adding cái is possible in some casual speech, but it is less formal and often unnecessary here.

So một biểu mẫu is a perfectly normal and natural choice.

Yes, you can, but the nuance changes.

• Nhân viên có một biểu mẫu. = The employee has a form / one form.
• Nhân viên có biểu mẫu. = The employee has forms / has a form available / has form documents in general.

Without một, the object becomes less specifically one single form and more general or indefinite.

Biểu mẫu is a correct and fairly formal word. It is often used for:

• forms
• templates
• official document formats

Depending on context, Vietnamese may also use:

• mẫu đơn = form, application form
• đơn = application, request form, petition
• phiếu = slip, ticket, form sheet

So biểu mẫu is good, especially in administrative or office-style language, but it is not the only possible word for form.

Usually, nhân viên means employee, staff member, or worker in an organization.

It is a broad and common word for someone working in an office, company, shop, bank, hotel, and so on.

Examples:

• nhân viên văn phòng = office worker
• nhân viên ngân hàng = bank employee
• nhân viên phục vụ = service staff / waiter staff

So it is a very useful general word, not a narrow one.

To negate it, you usually put không before the verb:

• Nhân viên không có một biểu mẫu.
• more naturally in many contexts: Nhân viên không có biểu mẫu.

If you want to emphasize not even one form / no form at all, you can say:

• Nhân viên không có một biểu mẫu nào.

A very common yes/no question pattern is to add không at the end:

• Nhân viên có một biểu mẫu không? = Does the employee have a form?

In natural conversation, you might also hear:

• Nhân viên có biểu mẫu không?

That version sounds slightly more general and is very common in everyday speech.

Usually, no.

You normally just say:

• một nhân viên
• hai nhân viên
• nhân viên này

Because nhân viên is already a noun meaning employee.

Using người before it is usually unnecessary here. For most learners, the safest choice is simply:

• một nhân viên, not một người nhân viên