Sentence Structure Essentials
Klíčové pojmy: English basic order is Subject–Verb–Object, Functional sentence perspective: theme (given) then focus (new), End-focus principle: new info tends to appear at sentence end, Use passive to place known information first, Intonation can create marked focus without word-order change, Fronting moves elements to sentence-initial position for emphasis, Clefting (It is/was ...) splits a clause to highlight one element, Pseudo-cleft uses a wh-clause to postpone focus, Extraposition uses anticipatory it to postpone heavy subjects/objects, Subject–lexical inversion follows fronted adverbials, Subject–operator inversion occurs in questions and after negative fronting, Existential there introduces new entities
## Introduction
Sentence structure determines how clause elements are arranged to convey meaning and information. In English, word order is central because morphological case marking is limited; positioning often indicates grammatical roles (subject, verb, object) and shapes how information is presented and emphasised. This guide breaks down core sentence-structure phenomena and shows how they operate in real writing and speech.
> Definition: Sentence structure is the arrangement of words and phrases to create well-formed sentences that express complete thoughts.
## 1. Core Principle: Grammatical Word Order
### Subject–Verb–Object (S–V–O)
- Most declarative English sentences follow the basic pattern: **Subject + Verb + Object**.
- Example: David sees Frederic. / Frederic sees David.
> Definition: Grammatical principle — clause elements follow canonical patterns such as S–V–O to indicate syntactic roles.
## 2. Functional Sentence Perspective (Information Structure)
- Sentences typically move from known information to new information.
- Key terms:
- **Theme / Topic**: information already given or assumed.
- **Focus / Rheme / Nucleus**: the new or communicatively important information.
Example:
- Our teacher wrote a book on grammar.
- Theme: Our teacher
- Focus: a book on grammar
> Definition: Functional sentence perspective — how a sentence organises information from given to new.
Fun fact: English prefers to place new or important information towards the end of the sentence to maximise clarity and impact.
## 3. End-Focus Principle
- **End-focus**: new or important information tends to appear near the end of a sentence.
- This explains why heavier or longer constituents are commonly postponed.
- Example: Our teacher wrote a book on grammar. (The end contains the focus)
## 4. Passive Voice and Information Structure
- Passive voice can reorder information so that a known item appears first and the new item appears later.
- Active: Our teacher wrote a book on grammar.
- Passive: The book on grammar was written by our teacher.
- Use passive when the theme is the book (known) and the agent is new or less important.
## 5. Marked Focus and Intonation
- Focus need not require syntactic movement; intonation (stress) can mark marked focus.
- Example sentence: We are painting our bedroom pink.
- Stress on different words changes the intended focus:
- pink — the colour matters
- bedroom — the location matters
- our — the owner matters
- painting — the activity matters
- are — tense/contrast matters
- we — the agent matters
> Definition: Marked focus — the most important information appears in a non-default position and is often signalled by stress or intonation.
## 6. Fronting (Preposing)
- **Fronting** moves an element to the beginning of a declarative sentence to give it emphasis or topical prominence.
- Common fronted elements: subject complements, direct objects, adjuncts.
Examples:
- Noah, my name is. (subject complement fronted)
- A really good film she has seen. (direct object fronted)
- Without money, I cannot buy anything. (adjunct fronted)
> Definition: Fronting — moving an element to sentence-initial position for emphasis or topicality.
## 7. Clefting
- **Cleft sentences** split a clause into two parts to highlight a chosen element; the pattern often uses *It is/was + focused element + relative clause*.
Base: Catherine is making some cakes in the kitchen.
- It is Catherine who is making some cakes in the kitchen. (focus: Catherine)
- It is some cakes that Catherine is making in the kitchen. (focus: some cakes)
- It is in the kitchen that Catherine is making some cakes. (focus: in the kitchen)
> Definition: Clefting — a construction that creates a foregrounded focus by dividing one clause into two smaller clauses.