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5) High/low/large/small -est
For example,
The largest proportion of immigrants came from Mexico.

These sentence structures are valuable tools for getting high marks for your Writing IELTS Task 1 essay, so practice using them.

3) 2 Common Grammatical Errors

For many students, two aspects of grammar that are a particular problem are:

• 
  Prepositions
  

• 
  Articles
  

Prepositions

There are two specific prepositions that you will probably use numerous times in your Task 1 essay when reporting change – ‘in’ and ‘of’. They are easy to get wrong.
Follow this general rule:

• 
  When stating the specific value of the change (number, amount, percentage etc.) – use ‘of’.
  

• 
  When stating what has changed – use ‘in’.
  

For example:

• 
  An increase of 20%.
  
• 
  An increase in the number of over 60’s taking exercise classes.
  

• 
  A drop of almost a half.
  
• 
  A drop in house prices.
  

• 
  An improvement of 45 units per week.
  
• 
  An improvement in retail sales from April to June.
  

‘Of’ is also used after a value. You will probably want to use proportional values in your Task 1 essay so here are some examples.

• 
  a small percentage of
  

• 
  just under a quarter of
  

• 
  exactly a half of
  

• 
  roughly three quarters of
  

• 
  a significant majority of
  

•