人教版（2019）英语高中选择性必修第一册 Unit 3 Discover useful structures（24张PPT）

(共24张PPT)
Unit
3
FASCINATING
PARKS
To
learn
and
practise
the
-ing
form
used
as
subject.
Have
you
ever
seen
these
signs
the
–ing
form
Identify
the
function
of
the
-ing
form
in
the
sentence
below.
Getting
here
is
quite
difficult.
Being
in
such
a
beautiful
and
wild
place
makes
me
feel
blesses
to
be
alive.
作主语
作主语
Find
more
sentences
with
the
–ing
form
as
the
subject
from
the
reading
passage.
For
hundreds
of
years,
looking
after
reindeer
was
a
way
of
life
for
the
Sami.
1.
(读书)
is
her
hobby.
Reading
2.
is
a
waste
of
time.
(玩电脑游戏)
Playing
computer
games
3.
is
dangerous.
(开车开得太快)
Driving
too
fast
4.
makes
me
happy.
(打篮球)
Playing
basketball
5.
is
a
good
way
to
relax.
(旅游)
Travelling
6.
can
bring
you
into
different
world.
(参观主题公园)
Visiting
theme
parks
动词-ing形式作主语
1.
动词-ing形式作主语，表示一般或抽象的习惯性行为，谓语动词用单数。如：
Reading
aloud
is
very
important
for
us
to
learn
a
foreign
language.
Going
to
bed
early
and
getting
up
early
is
considered
to
be
a
good
habit.
2.
在一些句子中，常用it作形式主语放在句首，而把真正的主语放到句末。
如：
It
is
no
use
crying
over
spilt
milk.
It
+
be
+
a
waste
of
time
doing
…
做……是浪费时间的
It
is
/
was
no
good
/
use
doing
…
做……是没益/用处的
It
is
/
was
hardly
/
scarcely
worth
doing
…
做……不值得
It
is
/
was
worth
/
worthwhile
doing
…
做……是值得的
There
is
no
sense
in
doing
…
做……没有道理
常用-ing形式作主语的句型有：
Rewrite
each
of
the
following
sentences
using
the
-ing
form
as
the
subject.
EXAMPLE
It
is
challenging
yet
really
fascinating
to
hike
through
the
mountains
in
the
pathless
Sarek.
Hiking
through
the
mountains
in
the
pathless
Sarek
is
challenging
yet
really
fascinating.
1
It
is
both
challenging
and
rewarding
to
study
abroad.
2
It
would
hardly
be
possible
to
go
on
a
hiking
tour
in
Sarek
in
winter
due
to
the
extreme
cold.
Studying
abroad
is
both
challenging
and
rewarding.
Going
on
a
hiking
tour
in
Sarek
in
winter
would
hardly
be
possible
due
to
the
extreme
cold.
3
Honestly,
it
can
be
both
exciting
and
terrifying
to
explore
a
vast
unknown
land.
4
It
is
good
to
adopt
a
positive
attitude,
even
when
things
are
difficult.
Honestly,
exploring
a
vast
unknown
land
can
be
both
exciting
and
terrifying.
Adopting
a
positive
attitude
is
good,
even
when
things
are
difficult.
5
It
is
strongly
advised
to
hire
local
guides,
because
they
can
offer
accurate
knowledge
of
Sarek
culture
and
history.
Hiring
local
guides
is
strongly
advised
because
they
can
offer
accurate
knowledge
of
Sarek
culture
and
history.
Discuss:
How
does
the
sentence
focus
change.
Fill
in
the
blanks
using
the
-ing
form
of
a
verb
from
the
box
and
state
its
function.
One
word
will
be
used
twice.
Xixi
National
Wetland
Park,
10
square
kilometres
in
western
Hangzhou,
is
the
first
national
wetland
park
in
China.
city
life,
nature,
and
wetlands
makes
the
park
a
popular
destination
both
for
tourists
and
local
residents.
At
Xixi,
a
boat
tour,
covering
Combining
combine
cover
grow
take
limit
walk
experience
taking
along
paths,
and
local
customs
and
traditions
of
the
villages
in
this
park
are
at
the
top
of
the
list
of
people’s
favourite
activities.
With
trees,
bushes,
and
colourful
flowers
along
the
riversides,
the
park
shows
different
sides
of
beauty
in
different
seasons.
In
order
to
better
develop
as
well
as
preserve
this
place,
human
impact
on
Xixi
Wetland
was
considered
by
the
experiencing
growing
limiting
combine
cover
grow
take
limit
walk
experience
walking
park
designers.
All
the
new
buildings
were
designed
in
a
traditional
way
to
fit
into
the
natural
environment.
This
green,
watery
world
is
home
to
many
birds
and
fishes.
With
trees
in
the
shallows,
the
wetland
is
a
natural
system
for
providing
clean
water
and
producing
oxygen,
which
makes
it
the
“green
lungs
of
Hangzhou”.
growing
combine
cover
grow
take
limit
walk
experience
Choose
a
place
in
your
city
or
town
as
a
destination
for
a
school
trip.
Use
the
passage
above
as
an
example
and
write
about
your
choice.