常用it作形式主语的句型结构Word文件下载.docx
- 文档编号:14496892
- 上传时间:2022-10-23
- 格式:DOCX
- 页数:24
- 大小:83.13KB
常用it作形式主语的句型结构Word文件下载.docx
《常用it作形式主语的句型结构Word文件下载.docx》由会员分享,可在线阅读,更多相关《常用it作形式主语的句型结构Word文件下载.docx(24页珍藏版)》请在冰豆网上搜索。
(should)
study
hard
注意:
该句型中的形容词是(un)important,necessary等时,从句应为(should)+动词原形。
It+be+-ed分词+that-从句
适用该句型的过去分词主要有:
said,
reported,
announced,
hoped,
thought,told,believed,expected,decided,suggested,
known等。
①It
hoped
one
day
they
have
enough
animals
to
set
them
free
②Itiswellknownthattheearthgoesaroundthesun.
③Itissuggestedthatthesportsmeeting(should)beputoffuntilnextweek.
该句型的过去分词是suggested时,从句应为(should)+动词原形。
It+be+名词+that-从句
适用该句型的名词(词组)有:
a
pity,an
honor,a
good
thing,a
fact,a
surprise,good
news,one’sduty等。
如:
a
pity
(that)
you
missed
sports
meeting
last
week.
②It
fact
English
being
accepted
as
an
international
language.
It
+seem/
appear/
happen的适当形式+that从句。
该句型常可以转换成含不定式的简单句。
seems
there
big
waste
pipe
coming
down
from
town.
→There
town.
②He
appeared
tobecalm,
but
inside
his
heart
was
beating
wildly
with
fear.
→It
he
calm,
fear.
doesn'
t
matter
(It’snowonder;
Itdoesn’tmakemuchdifference等)
+
when/
where/
which/
whether
等从句。
①Does
itmatter
if
can'
finish
job
on
time?
②They
are
all
classmates.Itis
no
wonder
they
should
help
each
other
their
studies.
+
adj./
n.
(for
sb.
/
of
sb.)
do
sth.
该句型中的形容词通常是表示事物的特点或特征的如difficult,hard,easy,impossible,necessary,important等,此时用for;
或表示人的性格特征或特点的如nice,good,bad,kind,silly,foolish,wise,clever,
careless,rude,brave,cruel,careful,
grateful等,这时要用
of。
①Itisfoolishofyoutogiveupsuchagoodchance.
②Itisnecessaryforcollegestudentstomasteratleastaforeignlanguage
It作形式主语常见句型
动词不定式,动名词或主语从句作主语时,通常把它们放在谓语动词前,而用it作形式主语,放到句首,常见句型有:
1.It+be+形容词+主语从句,如:
ItisuncertainwhetherhecancometoJenny’sbirthdaypartyornot.
2.It+be+名词词组+主语从句,这类名词有:
afact,apity,ashame,anhonour,aquestion等,如:
It’sapitythatyoumissedtheexcitingfootballmatch.
Itremainsaquestionwhetherhewillcomeornot.
3.It+be+过去分词+主语从句,这类过去分词有:
announced,believed,expected,hoped,decided,reported,said,shown等,如:
Itisreportedthat16peoplewerekilledintheearthquake.
Itisnotdecidedwhowillgivetheoperationtothepatient.
4.It+不及物动词(seem,appear,happen等)+主语从句,这类不及物动词有:
appear,happen,seem等,如:
Itseemedthathedidn’ttellthetruth.
IthappenedthatIwasoutwhenhecalled.
5.It+be+形容词+forsb.)+动词不定式
这类句型常用形容词easy,difficult,hard,important,possible,wise等作表语,有时候为了强调不定式动作的执行者,常在不定式前加forsb,如:
It’snecessaryfortheyoungtomastertwoforeignlanguage.
Itisunwisetogivethechildrenwhatevertheywant.
这类形容词有:
easy,difficult,hard,important,possible,wise
6.It+be+形容词+ofsb.+动词不定式,这类形容词常是表示心理品质,性格特征的形容词,如:
kind,nicestupid,clever,foolish,polite,impolite,silly,selfish,considerate等。
某人和这些形容词可以构成主系表结构。
It’sverykindofyoutohelpmewiththework.
=Youarekindtohelpme.
Itseemedselfishofhimnottosharehisdictionarywithothers.
=Heseemedselfishnottosharehisdictionarywithothers.
7.It+be+名词词组+动词不定式,如:
Itisnotagoodhabittostayuptoolate.
8.It+be+名词或形容词+动名词,这类名词和形容词常常是:
good,nogood,nouse,awasteof,useless,senseless等,如:
It’sawasteoftimetalkingtoheranymore.
Itisnousearguingaboutthematterwithhim.
9.It+take(sb.)+时间(金钱)+动词不定式,如:
Ittooktheworkersalmostthreeyearstofinishbuildingthedam.
Itwilltakeawholedaytogettothetopofthemountainonfoot.
实战演练:
1.Itisgenerallyconsideredunwisetogiveachild
heorshewants.(NMET1997)
A.however
B.whatever
C.whichever
D.whenever
2.Infact
isahardjobforthepolicetokeeporderinanimportantfootballmatch.(2001上海)
A.this
B.that
C.there
D.it
3.
isafactthatEnglishisbeingacceptedasaninternationallanguage.(NMET1995)
A.There
B.This
C.That
D.It
4.Is
necessarytotakeoffourshoeswhenweenterthelab?
(MET88)
A.everyone
B.this
C.her
5.________willtakeyoualotoftimetofindhiminthecrowd.
A.It
B.I
C.We
D.They
6.Itisnousehis_________there,thesituationishopelessnow.
A.togo
B.tobegoing
C.going
D.havinggone
7.Itisnevertoolatetolearn,________?
A.isit
B.isn
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 常用 it 形式 主语 句型 结构
![提示](https://static.bdocx.com/images/bang_tan.gif)