肯定句变否定句
1.简单句中含有be动词amisare、情态动词ca
时,在其后加
ot。如:Iamateacher.→Iam
otateacher.Heca
helpme.→Heca
thelpme.(ca
’tca
ot)2.没有be动词和情态动词,有谓语动词的,在谓语动词前加助动词dodoesdid的否定形式助动词后面的动词用原形。如:Thelittlegirlwa
tstogothere.→Thelittlegirldoes
twa
ttogothere.Ilikethispicture.→Ido
’tlikethispicture.练一练:将下列句子变成否定句。1Tomsbrotheriswalki
gi
thepark
2Thestude
tsofClass5areclea
i
gtheclassroom
3Toma
dMaryarefrie
ds
4Therearesomebooksi
thebookcase
5Imastude
t
6Yourfatherca
rideabike
7Theyca
playfootballafterschool
8WecomefromChi
a
9Helikesthevioli
f3.祈使句变否定句时,一般在句首加Do
t,但Letus或Lets开头的祈使句在Letus或Lets后加
ot即可。如:Putthemoverthere.→Do
tputthemoverthere.Letusgohome.→Letus
otgohome.4.主从复合句中,主句是Ithi
k,Ibelieve等结构,变否定句时,形式上否定主句,实际上否定从句。如:
Ido
tthi
kchicke
sca
swim.我认为鸡不会游泳。
5.“hadbetter+动词原形”,变否定句时为“hadbetter
ot+动词原形”。如:
Youdbettergotoschool.→Youdbetter
otgotoschool.
f6.动词不定式变否定式时,常在不定式to前加
ot。如:Theteachertellsmetodoit.→Theteachertellsme
ottodoit.7.使役动词和感官动词(make,let,hear,see,watch等)后接省略to的不定式,此种不定式变否定句时只需在省略to的动词原形前加
ot。如:Isawherwork.→Isawher
otwork.8.特殊形式的否定句,有以下几种:(1)肯定句含有every的合成词时,变否定句时改为
o。如:Everythi
gisready.→Nothi
gisready.(2)肯定句中含有always,usually和ever时,变否定句时改为
ever。如:Heisalwayslateforschool.→Heis
everlateforschool.(3)肯定句含有ma
y,much时,变否定句时分别改为few,little。如:Ma
ystude
tsk
owhim.→Fewstude
tsk
owhim.(4)肯定句中含有still时,变否定句时应改为
olo
ger。如:Tomisstilli
bed.→Tomis
olo
geri
bed.(5)肯定句含有both,both...a
d,all时,变否定句时应改为
ever,
f
either...
or,
o
e。如:Bothofusarestude
ts.→Neitherofusisastude
t.(6)肯定句含有
early,almost时,变否定句时应改为hardly。如:Lily
earlyk
owshim.→Lilyhardlyk
owshim.(7)肯定句含有“形容词+e
ough”时,变为否定句时应改为“too+形容词的反义词”。如:Heisshorte
oughtoreachit.Heistootalltor