The easy way to ielts writing academic Module

Note that although there are different tenses for “passive
voice,” in writing task 1, we mainly use “present simple
passive” or “present continuous passive” as a process is always
done the same way and it is not described in a specific time
frame, so other passive voice tenses are not widely required.
2) Relative clauses
Relative clauses are dependent clauses that start with a relative pronoun such
as, which, that, who, where, when, and whose to give information about the
word they describe. They are great grammatical tools that help writings in
three main ways: firstly, they are used to shorten and extend sentences as two
writing techniques used for different purposes. Secondly, they provide better
cohesion in writing. Thirdly, they are great examples of “complex
structures,” which account for a high band score in the IELTS test. They are
also admired in any type of academic writing. There are two types of relative
clauses:
“Defining relative clauses,”
which provide essential information about
the noun they refer to, and they cannot be omitted from the sentence as
they are a part of it. As a punctuation rule, there are 
no 
“
commas
”
before and after defining relative clauses. These clauses are not
extensively used in writing diagrams and flowcharts as they mainly help
with concise writing, which may better fit writing task 2. In this type of
writing, we may need to extend sentences to meet the word limit
requirement.
For example
The pen which is on the table is mine. (The relative clause provides
essential information separating “the pen” from other pens.)
The tree that is in the middle of the garden does not grow well. (The
relative clause gives essential information about “the tree” to be
recognized in the garden among other trees.)