Sentence Structure

A) Introduction

This page about sentence structure will focus on the differences between simple sentences, compound sentences, complex sentences and compound-complex sentences.

Use the best sentence you can to communicate your ideas in the exam.

A) Simple Sentences

A simple sentence is one clause with a subject and verb.

Migration rose during the period studied. Formula = SV

However, it can have more than one subject and more than one verb:

2 subjects:

Migration and the number of road users rose during the period studied.
Formula = SSV

2 Verbs:

I witnessed migration rising during the period studied. Formula = SVV

2 subject and 2 verbs:

Migration and the number of road users rose and then fell during the period studied.
Formula = SSVV

You’ll have noticed that a sentence is not the same thing as a clause.
A sentence is a group of words that comes between two full-stops and it must be a complete thought that makes sense.
However do not give any explanation in your task 1 writing.

D) Common misuse of words in task 1 writing

Affect/Effect

A compound sentence consists of 2 or 3 clauses. This is when simple sentences are joined together.
In this sentence structure, the clauses are joined with the following coordinating conjunctions:

F = for A = and N = nor B = but O = or Y = yet S = so
The word ‘fanboys’ is an easy way to remember the different conjunctions that make up compound sentences. Obviously the most common are ‘and’, ‘but’, ‘or’ and ‘so’.

Here are some examples of compound sentence structure:

2 subjects:

Migration rose, but then started to level off. Formula = SV but SV
Migration rose, but then started to level off, so we must evaluate it differently.
Formula = SV but SV so SV.
Avoid writing too many clauses as the sentence may get difficult to follow, and you cannot use each one more than once in a sentence to join clauses.

This is wrong:

Migration grew during the period studied, and then started to fall, and then rose again. Incorrect formula = SV and SV and SV. X

2 subject and 2 verbs:

Migration and the number of road users rose and then fell during the period studied. Formula = SSVV

A possible corrected version:

Migration grew during the period studied, and then started to fall. In 2005 it began to rise again and quickly gathered pace.
Formula = SV and SV. SV.

Using semicolons

It is possible to have a compound sentence structure without a coordinating conjunction, and this is when you join two clauses with a semicolon. It is used when two ideas are related.

For example:

Computers are used widely in most countries; they are a sign of progress.

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