Simple sentence
People need exercise.
The foundation: one independent clause expressing one complete idea.
← Grammar CentreSentence structure · IELTS, PTE and CELPIP
22 English Sentence Structures: From Simple to Advanced
Learn the most important English sentence structures, starting with simple, compound, complex and compound-complex sentences before progressing to more advanced grammatical structures.
Quick answer
What are the four main sentence types?
English has four core sentence types based on clause structure: simple, compound, complex and compound-complex. The other items in this guide are useful grammatical structures that help you develop ideas, show relationships and demonstrate greater range.
Build the foundation first
Simple, compound, complex and compound-complex sentences
Master these four patterns before trying to make every sentence advanced. Accuracy and clarity matter more than unnecessary complexity.
Compound sentence
People need exercise, but many people are inactive.
Connects two independent clauses using coordination.
Complex sentence
Although exercise is important, many people are inactive.
Combines an independent clause with a dependent clause—essential for grammatical range.
Compound-complex sentence
Although exercise is important, many people are inactive, and this can cause health problems.
Combines coordination and subordination in one controlled sentence.
Complete reference
Explore all 22 English sentence structures
Open one structure at a time. Each example shows the pattern in a complete sentence and explains why it is useful.
Four essential sentence types
01Simple sentence
People need exercise.
The foundation: one independent clause expressing one complete idea.
02Compound sentence
People need exercise, but many people are inactive.
Connects two independent clauses using coordination.
03Complex sentence
Although exercise is important, many people are inactive.
Combines an independent clause with a dependent clause—essential for grammatical range.
04Compound-complex sentence
Although exercise is important, many people are inactive, and this can cause health problems.
Combines coordination and subordination in one controlled sentence.
High-value structures
05Modal verbs
Governments should invest more in education.
Expresses advice, obligation, possibility and other useful meanings.
06Comparatives and superlatives
Public transport is cheaper than driving.
Makes practical comparisons between people, places, choices or trends.
07Relative clauses
Students who study regularly usually improve.
Adds information about a noun and builds flexible complex sentences.
08Conditionals
If people exercise regularly, they will become healthier.
Connects a condition with its real, possible or hypothetical result.
09Passive voice
New houses are being built.
Changes the focus from the person doing an action to the action or result.
10Gerund structures
Studying overseas can be expensive.
Uses an -ing form as a noun phrase and increases sentence variety.
11Infinitive structures
Governments need to invest more.
Uses to plus the base verb for purposes, intentions and common verb patterns.
12Noun clauses
Many people believe that education should be free.
Lets a whole clause function as the object, subject or complement.
13Concessive clauses
Although technology has many benefits, it can cause problems.
Shows contrast and helps present balanced arguments.
14Advanced modal structures
Governments should have acted earlier.
Evaluates past actions using forms such as should have and could have.
Advanced structures
15Appositives
Sydney, Australia's largest city, is expensive.
Adds concise explanatory information beside a noun.
16Reduced relative clauses
Students living overseas may experience homesickness.
Reduces a relative clause to make information more concise.
17Participle clauses
Having completed the course, she applied for university.
Connects actions economically but requires careful control of the subject and timing.
18Complex comparisons
The more people exercise, the healthier they become.
Shows how one change is connected to another change.
19Correlative structures
Not only is exercise beneficial, but it is also inexpensive.
Links parallel ideas and creates emphasis through paired expressions.
20Cleft sentences
What governments need to do is invest in education.
Reorganises a sentence to emphasise its most important information.
21Inversion
Rarely do people consider the long-term consequences.
Places an auxiliary before the subject after certain negative or limiting expressions.
22Emphatic structures
I do believe education is important.
Uses do, does or did to add spoken or written emphasis.
Use structure with purpose
Which sentence structures matter for IELTS, PTE and CELPIP?
You do not need to force all 22 structures into every response. Choose structures that express your meaning clearly, then check that your grammar remains accurate.
IELTSUse controlled complex sentences, comparisons, conditionals and relative clauses to develop ideas clearly.
PTEBuild accurate sentences that fit the task, time limit and meaning rather than adding complexity for its own sake.
CELPIPUse practical, varied sentences to explain situations, give advice and support opinions naturally.