B1 Grammar: Essential Intermediate Structures

B1 grammar is the point where basic English starts becoming flexible. You need more than correct present tense sentences: you need to talk about experiences, tell stories, make plans, describe possibilities, compare options, give advice and connect ideas.

For Cambridge B1 Preliminary, grammar supports Reading Part 6, Writing and Speaking. The most efficient study plan is therefore practical: learn a structure, produce examples, then use it in a short communicative task.

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Which grammar topics should you prioritise at B1?

Focus first on structures with high everyday value:

• present simple vs present continuous;
• past simple vs past continuous;
• present perfect vs past simple;
• future forms;
• zero and first conditional, plus basic second conditional;
• modal verbs for ability, obligation, advice and possibility;
• comparatives and superlatives;
• articles and quantifiers;
• relative clauses;
• basic passive voice;
• gerunds and infinitives after common verbs;
• prepositions and common verb patterns.

Practise them in the B1 Grammar hub, but avoid completing exercises without creating your own sentences afterwards.

Present simple or present continuous?

Use present simple for habits, routines and stable situations: I work in a hotel.

Use present continuous for actions happening around now or temporary situations: I'm working from home this week.

The useful question is not “Which tense is more advanced?” but “Is this situation routine/stable or temporary/in progress?”

Watch for stative verbs such as know, believe, need, understand that are not normally used in continuous forms in their usual meanings.

A good drill is to describe your normal week and then describe what is different this week.

Past simple or past continuous?

Use past simple for completed events: I dropped my phone.

Use past continuous for background or an action in progress: I was walking home when I dropped my phone.

Storytelling often combines them. Draw a timeline: the longer background action surrounds the shorter event.

Do not memorise when = past simple and while = past continuous as absolute rules. Meaning determines the tense, although those linkers often appear with typical patterns.

Present perfect or past simple?

This is one of the most important B1 contrasts.

Use past simple with a finished past time: I visited Rome in 2024.

Use present perfect when the time is unfinished, unspecified or connected to now: I've visited Rome three times.

High-value signals include ever, never, already, yet, just, for, since.

The fastest improvement comes from producing pairs that show the contrast. Write one past simple and one present perfect sentence about travel, work, study and hobbies.

Which future forms do you need?

B1 learners should be comfortable with several ways to talk about the future:

• will for predictions and spontaneous decisions;
• be going to for intentions and evidence-based predictions;
• present continuous for arrangements;
• present simple for timetables.

Compare:

I'll answer the phone. — decision now.

I'm going to study engineering. — prior intention.

I'm meeting my tutor at four. — arrangement.

The train leaves at 6:20. — schedule.

Instead of choosing by keywords, ask what kind of future meaning you are expressing.

How do conditionals work at B1?

Zero conditional: general result — If you heat ice, it melts.

First conditional: realistic future possibility — If it rains, we'll stay inside.

Second conditional: hypothetical present/future — If I had more money, I'd travel more.

A common error is If it will rain.... In standard first conditional patterns, the if-clause normally uses present simple.

Practise with real choices: If I finish early tonight... and hypothetical ones: If I could live anywhere....

Which modal verbs matter most?

Use modals for communicative functions:

• ability: can, could;
• obligation: must, have to;
• lack of obligation: don't have to;
• prohibition: mustn't;
• advice: should;
• possibility: might, may, could.

Pay special attention to mustn't vs don't have to. You mustn't park here means it is prohibited; you don't have to come early means it is optional.

Meaning contrasts like this are more useful than memorising isolated definitions.

How do comparatives and superlatives become more flexible?

Move beyond bigger than and the best. Learn:

• much/far/a little + comparative;
• not as ... as;
• the same as;
• one of the most...;
• less ... than.

These structures are especially useful in Speaking discussions and Writing recommendations.

Example: Cycling is far cheaper than driving, but it isn't as practical in bad weather.

What should you know about relative clauses?

Use who for people, which for things and that in many defining clauses.

The woman who works at reception helped me.

The phone that I bought last month is already broken.

At B1, focus on clear defining clauses before worrying about advanced reduction. Relative clauses are valuable because they let you combine short sentences naturally.

How does the passive voice work at B1?

Basic passive structure is be + past participle.

People grow coffee here. → Coffee is grown here.

They built the museum in 1995. → The museum was built in 1995.

Keep the tense in the verb be. The past participle does not carry the tense by itself.

Use passives when the action or result is more important than the person who performs it.

Gerund or infinitive: what is enough at B1?

Learn common high-frequency patterns:

• enjoy doing;
• finish doing;
• avoid doing;
• want to do;
• decide to do;
• hope to do;
• would like to do;
• good at doing;
• interested in doing.

Group by pattern and create examples from your own life. Personal examples are easier to retrieve in Speaking.

How should you practise grammar for the B1 exam?

Use a four-stage cycle:

1. Understand one contrast.
2. Complete a small focused exercise.
3. Produce five original sentences.
4. Transfer the structure into Reading, Writing or Speaking.

For example, after present perfect practice, write a 100-word email about recent experiences. Then check whether your tense choices survive outside a grammar worksheet.

Common B1 grammar mistakes

• using past simple with since for an unfinished situation;
• forgetting the auxiliary in questions;
• mixing mustn't and don't have to;
• using will in the if-clause of basic first conditionals;
• using continuous forms with common stative verbs;
• forgetting the past participle in passive sentences;
• writing more easier or the most cheapest;
• learning rules but never producing examples.

A practical weekly grammar system

Choose two related areas per week, not eight unrelated chapters.

Example:

• Monday: present perfect vs past simple;
• Tuesday: focused exercises;
• Wednesday: 10 personal example sentences;
• Thursday: short Writing task using both tenses;
• Friday: mixed B1 grammar quiz;
• Saturday: review only repeated errors.

This gives the structure several encounters in different contexts.

Final takeaway

B1 grammar should make your English more useful, not more complicated. Prioritise tense contrasts, modals, conditionals, comparisons and core sentence-building structures. Produce your own language, connect grammar to real tasks and fix repeated mistakes before moving to rarer topics. Reliable control of common structures is exactly what an intermediate learner needs.