The easy way to ielts writing academic Module

Verb + Adverb/Adverb + Verb
For example
The rate of crime went up gradually in 2015.
The number of bike lanes considerably increased in the following
year.
The figure for car theft suddenly surged in 1987.
The proportion spent on food increased noticeably a decade later.
Common verb phrases:
Fell 
significantly/moderately 
dropped/rose 
minimally/increased
slowly/rapidly 
declined/marginally 
decreased 
/varied
modestly/fluctuated slightly/steadily grew/declined drastically
In most cases, noun and verb phrases describe upward and
downward trends. Other trends do not require adjectives or
adverbs much as they are clear on their own. For example, a peak,
a plateau, a period of stability, or a trough may occasionally
require an adjective or an adverb for more clarity.
Number and Amount
In writing task 1, candidates must describe numbers and amounts of different
kinds, such as percentages, proportions, numbers, and rates. Understanding
their differences helps with smoother descriptions. Numbers, amounts, and
percentages generally describe actual quantities of either things or people.
“The number of…”
is used for countable plural nouns, such as cars, people,
books, etc.
For example

---

The number of bike users in the city center rose moderately.
The number of households with two cars declined gradually over five
years.
The number of children with obesity had a dramatic rise in 2003.
In the three examples above, “bike users,” “households,” and “children” are
countable plural nouns, so “the number of” is used as a quantifier.
On the other hand, 
“The amount of …” 
is used to address uncountable
nouns, such as rice, oil, gas, food, energy, time, money, etc.
For example
The amount of energy produced rose significantly in 2009.
There was a marginal decline of 1% in the amount of rice consumed
over the past decade.
The amount of time spent on computers did not change over the
period.
In these sentences, “energy,” “rice,” and “time” are uncountable nouns, so
“the amount of” is used as a quantifier.