The easy way to ielts writing academic Module

For example
If students study hard, they get great results.
(
Zero conditional 
is
formed by 
“If+ present simple, + present simple.” 
This
structure is useful in describing
routines/facts/real 
and
possible situations
.)
Unless the government acts now, the economy will suffer an
irreversible crisis.
(
First
conditional 
is
formed by 
“If+ present simple, + future.” 
This structure
describes 
real 
and
possible situations.
)
Provided (that) farming methods were automated, food production
would be faster.
(
Second conditional 
is
formed by 
“If+ past simple, + would+ base form of the
verb.”
This typical complex structure describes
hypothetical, unreal, 
but
possible situations.
)
If he had studied science instead of math, he would have been a
doctor now.

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(
Third conditional 
is
formed by 
“If+ past perfect, + would+ have/has+ pp”
.
This conditional type is useful in describing situations that are 
unreal 
or
impossible to change 
as they happened in the past,
such as 
regrets
.)
Modal verbs
Modals are functional grammar tools, which make it easier to express
probability, ability, obligation, or necessity. Some common modal verbs are
can
, 
could
, 
should
, 
may
, 
might
, 
must
. Note that after all modals, 
infinitives
without “to” 
should be used.
For example
He 
can
paint well. (
ability/skills/present tense
)
She 
could
achieve a higher goal. (
probability/ability/past tense
)
You 
should 
try windsurfing. (
suggestion/present-future
)
You 
should
see a doctor if you are sick. (
advice/necessity/present
tense
)
I 
might/may 
go shopping tomorrow. (
possibility/future
)
They 
must
wear uniforms. (
obligation/rule/present tense
)