语动名词名词形容词副词形容词副词现在分词过去分词
f动词不定式的用法
词类特点名词成分主语基本用法惯用法：惯用法：it做形式主语Tolear
aforeig
la
guageis
oteasyItis
oteasytoaforeig
la
guage不定式复合结构Itbeadj表客观情况forsbtodoItiseasyformetospeakE
glishItwashardforhimtosaybyebyeIt’simpossibleforhertolookafterthebabywelladjdifficulthardeasyimporta
ti
teresti
gpossibleimpossibleu
ecessary
ecessaryItbeadj（表主观感情或态度）ofsbtodoItiski
dofyoutohelpmeYouareki
dtohelpmeIt’svery
iceofyoutosaysoIt’swascleverofhimtodosoadjgoodki
d
iceho
estrudepoliteimpolitewisecleverfoolishsillyrightwro
gcarefulcarelessselfishcruelMydreamistobecomeapia
istIwishtobeapia
istThemostimporta
tthi
gisfi
ishtheworko
timeToseeistobelieve眼见为实。常用句式例句Itbeadjeasyharddifficultimporta
ttodoIt’shardtosaywhicho
eisbetterIt’s
ot
ecessarytogetupsoearlyIt’sbettertogetupearlyi
spri
gAdjeasyharddifficultimporta
tpoliteItbe
todoItwasgreatfu
tohaveapic
icthereIt’sagreatpleasuretoworkwithyouItvtakecost
pro
mo
eytimetodoIttakesmetwohourstofi
ishmyworkThebookcostmefiveyua
Ispe
tfiveyua
o
thebookIspe
tfiveyua
buyi
gthebookIpaidfiveyua
forthebookItmakesbadjtodoItmademea
grytoseethatthief备注疑问词todo疑问词不定式短语起名词作用可作主、宾、表语疑问词；whatwhichwhowhomwhosehowwherewhe
动词：tellteachk
owwo
derlear
asku
dersta
dfi
doutWhe
tostartis
otk
ow
Thequestio
ishowtodoitIdo
’tk
owwhattodoIca
’tdecidewheretogoIca
’tdecidewhichpairoftheshoestobuy
表语
f词类特点名词
成分宾语
基本用法vttodoTheybega
toreada
dwriteWhatsportsdoesheliketoplayWhatdoyouwa
ttobewhe
yougrowupAtprese
tIca
’taffordtobuyahouseIpromisedtohelpherIhopetoseehimsoo
vttodoSheaskedmetospeakmoreloudlyLucytoldhim
ottocryHei
vitedhisclassmatestotakeparti
hispartyTheteacherlikesherstude
tstoaskquestio
svtsbdoIsawama
gostraighti
tothebuildi
gTheyheardhimsi
gaso
gi
theroomThebossmademeworko
weeke
dsIhavealotofthi
gstodoHaveyougota
ythi
gtoeat定语后置定语后置定语后置不定式的一般式表示被动一般式表示被动：用不定式的一般式表示被动：ThisbookisdifficulttoreadThefirstlasttodoTheywerethefirsttocometoChi
ai
1970s
常用句式例句惯用法：做形式宾惯用法：it做形式宾语Ifou
ditimpossibletocrosstheriverIfou
ditimr