Warm-up

Let's see what comes to mind — no notes, and don't worry about mistakes.

Complete this true sentence about yourself:

"I speak two languages."

SPEAK

Say two things you can do and one thing you can't do — anything at all.

Listen in on this conversation

Customer: Excuse me, could you bring some more water, please?

Waiter: Of course, one moment.

Why "could" here, and not "can"? Both are grammatically fine. Say your idea out loud before you check.

Check your idea CLICK
"Could you...?" just sounds a little more polite than "Can you...?" — that's why it's so common with people you don't know well, like a waiter or a shop assistant. Today you'll meet "could" again, plus new ways to talk about rules and give advice.
Today: must / have to for rules, the difference between mustn't and don't have to, should / shouldn't for advice, and polite phrases like could you and I'd like — so you can talk about rules, give advice, and ask for things politely.

Rules & Obligations: Must & Have To

For rules and things you need to do — at work, at home, or anywhere.

Spot the pattern

Three everyday rules:

Before you check: does "must" ever change its form? What about "have to"?

Check the pattern CLICK
must never changes — I must, you must, he must, they must. have to changes like any other verb — I/you/we/they have to, but he/she/it has to (same "-s" rule as any present simple verb).
must + base verb (no "to")
have to / has to + base verb
Watch out: "must" never takes "to". "You must to work" is wrong — it's just "You must work."
Watch out: with he/she/it, "have" becomes "has". "He have to go" is wrong — it's "He has to go."

Your turn

1. The new intern starts on Monday.

Tell them the rule: "He by 8 am every day."

2. A sign at the swimming pool has a rule about hygiene.

"Swimmers before entering the pool."

SPEAK

Say two rules from your own job, school or home using must or have to. For example: "At home, we have to..."

Not Allowed or Not Necessary? Mustn't vs Don't Have To

Two negative forms that look similar but mean completely different things.

Spot the pattern

What's the difference in meaning between the first sentence and the other two?

Check the difference CLICK
mustn't = it is forbidden — do NOT do this. don't have to / doesn't have to = it's not necessary — you can if you want, but you don't need to. Same negative shape, opposite meanings!
mustn't (must not) + base verb → not allowed
don't / doesn't have to + base verb → not necessary
Watch out: "You don't must" doesn't exist — "must" never takes "don't" in front of it. For "forbidden", use mustn't. For "not necessary", use don't have to / doesn't have to.

Your turn

1. A sign in the museum protects the paintings.

"Visitors the paintings."

2. Your friend says the meeting isn't urgent — you can go tomorrow instead.

Tell another friend: "We today — we can go tomorrow."

3. Choose the right option. "This lift is out of order, so you ___ use it."

SPEAK

Say two things you mustn't do at work or school, and two things you don't have to do this week.

Advice & Polite Requests

Softer language — for giving advice and for asking people for things nicely.

Spot the pattern

What comes straight after "should" and "shouldn't"? And what comes straight after "could you"?

Check the pattern CLICK
should / shouldn't + base verb, for advice about what's good or bad for someone. Could you + base verb ...? is a polite question asking someone to do something. I'd like (= I would like) + a noun or "to" + verb is a soft, polite way to say what you want — softer than "I want".
should / shouldn't + base verb
Could you + base verb ...?
I'd like + noun / to + verb
Watch out: "should" never takes "to". "You should to rest" is wrong — it's just "You should rest."

Your turn

1. Your friend has a terrible headache.

Give advice: "You some water and rest for a while."

2. Your friend eats fast food every night.

Give gentle advice: "You fast food every night — try cooking sometimes."

3. You're in a restaurant and want the bill. Make this polite.

Direct: "Bring the bill." Polite: " the bill, please?"

SPEAK

Role-play: order a drink or some food in a café politely, then ask the server for one more thing using "Could you...?"

Your Turn to Talk

Time to put rules, advice and polite requests together in one real situation.

The situation

Imagine a new coworker or flatmate starts today. Tell them about the place — the rules and one piece of advice.

Talk out loud for one minute. Try to answer:

01:00

Now put it in writing

Write a short message (3–5 sentences) to a new flatmate or coworker. Explain one rule they must follow or have to do, one thing that's not allowed or not necessary, and give one piece of advice. The checker will tell you which ones it finds.

Mix It Up

Real life doesn't tell you which form to use. Here everything is mixed — you decide.

Fix the mistakes

Each sentence has one grammar mistake. Rewrite the whole sentence correctly.

1. "You must to arrive on time every day."

2. "I don't must work on Sundays."

3. "You should to try the new restaurant downtown."

4. "He have to finish his homework before dinner."

Which form fits?

5. Notice on the staff door: "Employees ___ wear a name badge at all times."

6. "It's a public holiday today, so you ___ go to work."

7. You need the waiter's help. Which is the most polite way to ask?

SPEAK

One-minute challenge: imagine you're explaining the rules of your home to a new roommate. Say two things they must do, one thing they mustn't do, one thing they don't have to do, and one piece of advice with should. Time yourself for one minute, or reuse the timer on the speaking tab.

What Do You Remember?

First, from earlier lessons

1. Complete with the correct verb form: "My sister in a hospital." (work)

2. Say it out loud: what's the difference between "can" and "could" when you ask someone for something politely?

Compare with a possible answer CLICK
One possible answer: both ask for help, but "could" sounds a little more polite and a little more formal than "can". "Can you help me?" is fine with friends; "Could you help me?" works everywhere, including with people you don't know well.

Now, today's grammar — fresh sentences, no looking back

3. At passport control, a sign says: "All passengers a valid passport."

4. Notice on a train: "Passengers their feet on the seats."

5. Your friend is stressed and not sleeping well. Give advice: "You going to bed earlier."

Think back

Which practice helped you most today — fixing the mistakes, choosing the right form, or the speaking tasks? Say why you think that one worked for you.

Can you now...?

At the start we said: rules, advice, and polite requests. Tick what's true:

Anything you didn't tick — go back to that tab and try the exercises once more. They'll still check your answers.