Fill sth up Meaning / Examples / How to Use

What Does “Fill sth up” Mean?

“Fill sth up” means to make something full by putting something into it, usually a container or space.

Introduction

The phrase “fill sth up” is a common phrasal verb in English. It means to put something into an object until it is full. This could be filling a glass with water, filling a car’s gas tank, or filling a room with people. The “sth” in “fill sth up” stands for “something,” which means you can replace it with any noun that can be filled. Understanding the fill sth up meaning helps you use it naturally in conversations and writing. It is a practical phrase that appears often in daily life, making it useful for learners of all levels.

Quick Info Box

• Phrasal verb: fill something up
• Type: transitive
• Level: A2–B1
• Short meaning: to make something full by putting something into it

Structure (Grammar Rules)

“Fill sth up” is a separable phrasal verb. This means you can place the object (something) between “fill” and “up,” or after “up.”

• Fill + object + up: She filled the bottle up with water.
• Fill + up + object: She filled up the bottle with water.

Both forms are correct and commonly used.

How to Use “Fill sth up”?

You use “fill sth up” when you want to describe making an object or space full. It often involves liquids but can also refer to other items like seats, containers, or forms. The phrase is usually followed by the thing being filled and sometimes information about what is used to fill it.

For example, you can say “fill the glass up with juice” or “fill up the car with petrol.”

Examples

Here are some natural sentences using “fill sth up in a sentence”:

• Can you fill the tank up before we leave?
• She filled her cup up with coffee.
• We need to fill the form up before submitting it.
• The room quickly filled up with guests.
• He filled up the bucket with water from the tap.

Common Mistakes

Some learners confuse the word order or forget to use the object. Here are some common mistakes and the correct forms:

• Incorrect: Fill up the bottle water.
  Correct: Fill up the bottle with water.
• Incorrect: Fill up water the glass.
  Correct: Fill the glass up with water.
• Incorrect: Fill up.
  Correct: Fill the tank up.

Remember to include what you are filling and what you are filling it with.

Differences / Synonyms

“Fill sth up” is similar to “top up” and “load up,” but they are used differently.

• Top up: Usually means to add a small amount to something already partially full. For example, “I topped up my phone credit.”
• Load up: Means to put a large amount of items into something, often a vehicle or container. For example, “We loaded up the truck with boxes.”

“Fill sth up” focuses on making something full, not just adding a little or loading many items.

Common Collocations

Many objects are commonly used with “fill sth up.” Here are some examples:

• Fill the tank up: usually refers to a vehicle’s fuel tank.
• Fill the glass/cup up: to make a glass or cup full of liquid.
• Fill the bucket up: to fill a bucket, often with water.
• Fill the form up: to complete all parts of a form.
• Fill the room up: to make a room full of people or things.

Related Phrasal Verbs

Here are related phrasal verbs of fill sth up:

• Fill Sb Up
• Fill Sb In
• Fill Yourself Up
• Fill Sth Out

Real-life Dialogue

Here is a short conversation using “fill sth up”:

Anna: The car is almost empty. Can you fill the tank up?

Ben: Sure, I’ll stop at the gas station on the way.

Anna: Thanks! Also, can you fill the water bottle up before we go?

Ben: No problem.

Practice

Try to complete the sentences with “fill sth up” in the correct form.

• Can you ______ the glass ______ with juice?
• We need to ______ the gas tank ______ before the trip.
• She ______ the bucket ______ with water from the well.
• Don’t forget to ______ the form ______ before submitting it.

FAQs

• Q: Is “fill sth up” formal or informal?

  A: It is informal and commonly used in everyday conversation.
• Q: Can “fill sth up” be used for non-liquid things?

  A: Yes, it can be used for any object or space that can be made full.

• Q: What is the difference between “fill sth” and “fill sth up”?

  A: “Fill sth up” emphasizes making something completely full, while “fill sth” can mean partially or fully.
• Q: Can I say “fill up the glass” instead of “fill the glass up”?

  A: Yes, both are correct and commonly used.

• Q: Is “sth” always written as “something”?

  A: Yes, “sth” is a shorthand in dictionaries; in sentences, use the actual noun.