IELTS Writing Correction Service
Writing Samples
Band 4

The diagram below shows how biofuel called ethanol is produced. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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The diagram demonstrates the ethanol-making
process
Use synonyms
, which is
also
Linking Words
 called biofuel production. In general, the production is a cylindrical
process
Use synonyms
, which consists of nine particular stages, involving the plants absorbing carbon dioxide, plants harvesting, transforming it to cellulose, converting it to ethanol, and ethanol is burned back to the atmosphere via transportation utilisation. The
process
Use synonyms
begin
Correct subject-verb agreement
begins
show examples
 when plants and trees absorb sunlight and carbon dioxide as energy to grow. Once harvested, they first undergo
pre-processing
Correct article usage
a pre-processing
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 stage, where they are put into
crusher
Correct article usage
a crusher
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 machine to break them into smaller pieces to make it easier to
process
Use synonyms
 them
further
Linking Words
. After that, the small particles are turned into cellulose, and by implementing
chemical
Correct article usage
a chemical
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 procedure, they are converted into sugars. After the sugar is produced, microbes are added
into
Change preposition
to
show examples
 the sugar to obtain ethanol, which
Linking Words
then is
Correct word order
is then
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 used for various vehicles to run their machines.
Moreover
Linking Words
, through
burning
Correct article usage
the burning
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 mechanism, carbon dioxide is released to atmosphere
and
Punctuation problem
, and
show examples
 the
process
Use synonyms
start
Correct subject-verb agreement
starts
show examples
 again from
beginning
Correct article usage
the beginning
show examples
.

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Introduction: The introduction is missing.
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Introduction: Change the first sentence in the introduction.
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Introduction: The chart intro is missing.
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Basic structure: Change the third paragraph.
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Introduction: The chart intro is missing.
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Vocabulary: Replace the words process with synonyms.
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Vocabulary: Only 1 basic words for charts were used.
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Vocabulary: Use several vocabularies to present the data in the second paragraph.
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Vocabulary: Use several vocabularies to present the data in the third paragraph.
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Topic Vocabulary:
  • procurement
  • raw materials
  • milled
  • surface area
  • fermentable substance
  • enzymes
  • yeast
  • fermentation
  • byproducts
  • isolate
  • purified
  • distillation
  • concentration
  • containers
  • distribution
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