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Do you find yourself feeling puzzled when someone uses the words "must" or "shall" in a sentence? Do you wonder what they really mean?
It's easy to confuse these two words! But It's important to grasp the use of "must" vs. "shall" as it's often used in everyday conversations. So let's simplify it and help you steer clear of any confusion that you might make when using these words!
"Must" vs. "Shall"
How are they similar?
"Must" and "shall" are helping verbs. They come before main verbs in a sentence, and they express ideas about necessity and obligation.
When you want to ask for permission or make requests, helping verbs are a very important part of speech! Using them correctly can make a big difference in how you express yourself. Let's learn how and when to use these words
Understanding "Must"
Example: Plants must have light and water to grow.
"Must" shows the necessity for plants to receive both light and water to successfully grow.
Use "must" to express obligation or duty, or following rules and laws.
Example: You must wear a seatbelt when you are driving.
The verb "must" shows an obligation to wear a seatbelt as it's the law.
Example: You must visit SeaWorld when you're in San Diego.
In this example, "must" expresses a personal strong recommendation for visiting SeaWorld when in San Diego.
Example: The dark grey clouds outside suggestit must rain soon.
In this example, "must" means rain will probably happen soon because dark grey clouds are in the sky.
Understanding "Shall"
"Shall" shows a future action or obligation.
Here's a breakdown of what "shall" means and how people typically use it:
"Shall" is often used in legal documents or formal speech. You might come across this word when listening to government speeches, or watching old British movies.
Example: The defendant shall appear in court on the specified date.
"Shall" is a formal way to talk about something that will happen or exist in the future.
Example: We shall meet at the library at 10 am.
Quiz
A manager is having difficulty with a work task. Their team member wants to help. How should the employee ask the manager if they need help?
The employee is offering to help, so "Shall I help?" would be the correct question to ask their manager. "Must I help you?" wouldn't be correct because the employee isn't asking to see if it's a requirement to help.
Take Action
Ready to become a pro at understanding the difference between "must" vs. "shall"?
This Byte has been authored by
Kirsten H
Learning Designer Volunteer
Master