How To Use Shall And Will: A Comprehensive Grammar Guide

Many people learning English wonder how to use shall and will correctly. These two words are small but carry a lot of meaning in the English language, especially when forming the future tense. They’ve been part of the English grammar system for centuries, but their usage has shifted depending on whether you’re in the United Kingdom or the United States. If you’ve ever asked yourself why we say I will go but sometimes see I shall go, you’re not alone. In this guide, we’ll explore their differences, how they function as auxiliary verbs, and when each is appropriate in spoken English and writing. By the end, you’ll feel confident using them naturally in any sentence or context.

A Brief History of “Shall” and “Will”

To appreciate how these words are used today, it helps to look at where they came from. “Shall” is the older of the two, tracing its roots back to Old English, where it expressed obligation or determination. “Will” emerged later from a word meaning “to want” or “to wish.” Originally, “shall” was used to state that something must happen, while “will” was used to express intent or desire.

In modern English, however, this line has blurred. Over time, people started to use “will” more frequently, especially in American English, while “shall” remained more common in British English. Even dictionaries and grammar guides note that “shall” sounds slightly archaic, though it still appears in formal statements, contracts, and law.

This evolution reflects how the English language adapts to modern speech patterns. The shift from “shall” to “will” shows how native speakers simplify their communication without losing meaning.

How to Use Shall and Will

Before diving deeper, it’s helpful to get an overview of how to use shall and will. Both are modal verbs used to express future actions or intentions. The good news is that the rules are quite simple once you get the hang of them. We shall go through them in detail below.

1. General Rule for Shall and Will

Traditionally, shall is used with the first person pronouns (I and we), while will is used with the second and third person (you, he, she, it, they). For example:

• I shall call you tomorrow.
• We shall visit Paris next summer.
• He will arrive later tonight.
• They will help us with the project.

However, when emphasis or determination is intended, this pattern is reversed:

• I will not give up!
• You shall pay for this!

So, the general rule is simple, but context can flip the tone. The difference between “shall” and “will” often lies in how strong or formal the speaker wants the sentence to sound.

2. Using “Shall” in Formal English

In standard British and US English, “shall” still appears in legal writing, contracts, and formal propositions about the future. For example:

• The tenant shall pay rent on the first day of each month.
• The committee shall decide by majority vote.

Here, “shall” indicates obligation, almost like saying “something must happen.” It’s also used in polite or formal statements, such as:

• Shall I open the window?
• Shall we begin the meeting?

These uses show that “shall” can sound polite or official, making it a preferred choice in formal English grammar.

3. Using “Will” in Everyday English

In spoken English, “will” dominates. It’s simpler, natural, and used for most situations that involve the future tense. You’ll hear it everywhere:

• I’ll see you tomorrow.
• He’ll call once he’s home.
• They’ll start the movie soon.

When you say “I’ll” or “he’ll,” that’s a contraction of “I will” or “he will.” Contractions like these are very common in casual conversation because they make speech smoother.

Compared to “shall,” “will” is easier to use and more flexible. Whether you’re talking about plans, promises, or negative sentences about the future, “will” fits almost anywhere.

3. How “Shall” and “Will” Express Future Time

Both words form the future tense when used as auxiliary verbs before the base form of the main verb:

• I shall ask her tomorrow.
• We will finish it soon.

While both express future actions, “will” often conveys intention, and “shall” implies commitment or obligation. In uses of English verb forms, this distinction helps clarify your context and tone.

4. Affirmative and Negative Sentences with Shall and Will

You can use both in affirmative and negative sentences. For example:

• I shall go to the store tomorrow.
• I shan’t go to the store tomorrow. (shan’t = shall not)
• He will go if it stops raining.
• He won’t go if it doesn’t.

Notice how negative sentences about the future use shan’t or won’t as contractions. “I shan’t” sounds archaic or British, while “I won’t” is preferred in modern English.

5. When to Use “Shall” for Offers, Suggestions, and Promises

“Shall” isn’t only about obligation, it’s also useful when you make an offer or suggestion:

• Shall we go for coffee?
• Shall I help you with that?

It can also express determination or promise:

• You shall get your reward.

This use highlights how “shall” can convey a polite tone or a sense of duty.

6. Examples and Common Mistakes

Many learners confuse when to use shall versus “will.” Here are some practical examples:

✅ I shall call the doctor tomorrow. (Formal tone)
✅ I will call the doctor tomorrow. (Normal, everyday tone)
✅ Shall we start the class? (Polite question)
❌ Will we start the class? (Incorrect if meant as a polite offer)

To improve your fluency, avoid overusing “shall” in spoken English, it can sound old-fashioned unless you’re making a formal statement or writing for law or official documents.

Difference Between Shall and Will

The difference between shall and will lies in tone and tradition. “Will” is the dominant choice for expressing future time in both American English and modern English, while “shall” adds formality or politeness.

In British English, “shall” remains part of standard British speech, especially in offers or suggestions (Shall we?). But in the United States, “will” is preferred in nearly all contexts.

Sometimes, both words are used interchangeably without changing meaning. For instance:

• I shall be there at six.
• I will be there at six.

Both are correct, but “shall” sounds more formal or British.

If you’d like to learn how small word choices affect tone in writing, check out this helpful guide on crutch words that explains how to keep your sentences clear and purposeful.

Common Contractions and Spoken English

In everyday conversation, “shall” and “will” often appear in shortened forms. These contractions make speech sound natural and fluent. Examples include:

• I’ll = I will
• He’ll = He will
• We’ll = We will
• I shan’t = I shall not

While I’ll and he’ll are common, shan’t is rarely heard outside the United Kingdom. Many native speakers never use “shan’t,” even though it’s grammatically correct.

When writing formally, say, in a report or an excuse letter, avoid contractions altogether. 

Shall and Will in Modern English

Today, shall is only used in limited contexts. You’ll find it mainly in:

• Legal and policy documents (The company shall provide safety training.)
• Formal writing (Shall we proceed?)
• Religious or poetic texts (Thou shalt not kill.)

Most of the time, people simply use “will.” It’s the go-to word in modern English for all person pronouns, including second and third person.

Still, knowing how to use “shall” correctly helps when you’re reading formal statements or writing in a law context. It also keeps your grasp of English modal auxiliary verbs well-rounded.

Formal and Legal Usage of Shall and Will

In law, “shall” often expresses duty or obligation. For example:

• The employee shall report any conflict of interest immediately.

In this case, “shall” means the person must do it. This isn’t optional, it’s mandatory. In contrast, “will” in legal documents might simply describe future time reference, not a requirement.

That’s why dictionaries of English define “shall” as being used to express obligation, while “will” is used to predict actions or intentions.

You’ll also find shall in formal rules or procedural writing. For instance, if you’re preparing slides and want to use precise language, check out the guide on PowerPoint rules for presentations for structured communication tips.

Common Learner Challenges

Learners often get confused about how shall sounds compared to “will.” Here are some common problems:

• Using “shall” in casual talk when “will” sounds better.
• Forgetting that “shall” can sound archaic in American English.
• Mixing affirmative and negative sentences incorrectly (e.g., I won’t shall go).

To avoid these mistakes:

• Remember that “shall” works better for formal or polite questions.
• Use “will” for almost everything else in spoken English.
• Listen to native speakers and note which one they prefer.

If you’re curious about tone when writing about personal or sensitive subjects, here’s a great related read on How to Write About Disability, it covers how language choice affects clarity and empathy.

Tips to Learn English Usage Naturally

Here’s how to make the use of shall and “will” second nature:

1. Read British English and American English materials to spot differences.
2. Practice writing short sentences using both words.
3. Record yourself to hear how shall sounds in speech.
4. Refer to a dictionary to confirm the form used in examples.
5. Practice with affirmative and negative sentences to get comfortable.

If you’re learning the Tamil language or Turkish language, you’ll notice that grammatical tense markers work differently, but the idea of predicting the future remains universal.

Conclusion

Learning how to use shall and will is easier than it seems. Both words help express future actions, but “will” dominates in modern English while “shall” adds formality or obligation. Once you learn the difference, you’ll know exactly when each fits the context, whether in speech, law, or polite offers. Keep practicing, and you’ll find that using these modal verbs becomes as natural as speaking itself.

FAQs

1. What is the main difference between “shall” and “will”?
“Shall” sounds formal and often implies obligation or politeness, while “will” is more common for everyday speech and general future statements.

2. Do people still use “shall” today?
Yes, but mostly in the United Kingdom, legal writing, and formal contexts. In casual talk, people prefer “will.”

3. How do you know when to use “shall” instead of “will”?
Use “shall” for offers, suggestions, or when something is required by rule or law. Use “will” in all other cases.

4. Is “shall” used in American English?
Rarely. In American English, “will” is almost always used, even in the first person.