The easy way to ielts writing academic Module

The most common sequencing words are as follows:
To begin/first/firstly/first of all/second/secondly/
then
 /next/after
that/following this/following that/at this
point/subsequently/before/after/thereafter/lastly/finally
These sequencing words are usually put at the beginning of a sentence,
followed by a comma. Among these words and phrases, “
then
” is the only
one that can be put between the two parts of a passive verb, and there is no
need to use a “comma” in this case.
For example
Firstly, the raw material is transported to the factory.
Secondly, they are processed in high-temperature ovens.
Subsequently, they are molded.
They are then transported to the warehouse. (“Then” is placed
between the two parts of the passive voice, and no commas are
required in this case.)
Linear diagrams
The following diagram shows steps in producing wine in a small winery.
Summarize the information by reporting the main steps.

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Explanatory sample writing
1) 
Introduction
The diagram illustrates how wine is made in a small-scale winery.
(The verb “illustrate ” has introduced the paragraph as it is elaborated
through pictures; synonyms have effectively paraphrased the topic.)
2) Overview
Overall, a few steps and some automated machines are involved in wine
production, starting with harvesting grapes and ending with
transporting wine bottles to the warehouse.
(The signal word, “overall, ” has initiated the paragraph; the beginning and
the ending steps are mentioned leaving details out; as some stages are a
combination of a few smaller ones, the number of steps is introduced in a
general way.)
3) Body paragraph 1