定要用动词原形。
练一练
1、用适当的助动词填空。1______youlikethismagazi
e2Thegirl______likebreadforbreakfast3What______she______attheweeke
dsSheusuallyplaysgameswithherfrie
ds4Wha______youdolastSu
dayIwrotetomyfrie
d5DidyouseeaBeiji
goperaNoI______6He______
otvisitafarmlastNatio
alDayholiday7They______
otlikeplayi
gvolleyball8______Jimhaveapic
icwithhisfamilyeverySaturdayYeshe
6
fPracticemakesperfect9______Hele
a
dYa
gLi
ggotoschoolo
footeveryday10Howma
ykites______wehaveWehavete
2、找出下列句子中的错误，将序号填入题前括号内，并改正。1Didyouhadabiglu
chwithyourfamilylastSpri
gFestivalABC2Whatdotheboyhavei
hispe
cilboxHehasarubberABC3Theydoes
’tlikethefilmABC4DoJimgetupatsixeverydayABC5Do
tgivi
gtheballtoLiuTaoABC3、情态动词、情态动词也是一类特殊的动词，平时我们不把它说成是动词。情态动词可以和行为动词同时出现在同一个句子中。我们现在学过的情态动词有：ca
、could、shall、should、will、would、may、might、must。注意：情态动词后动词总是用原形。（不受其他任何条件影响）其否定形式：ca
otca
’tmust
otmust
’t…注意：may
ot和shall
ot（无缩写形式）
练一练
选择填空。1Thesig
o
thewallmea
syou______stayawayfromthebuildi
gAmustBca
’tCshould
t2Howma
ybooks______youseeo
thedeskAmayBca
Cshould3Itmea
syou______make
oisei
thelibraryAshouldBshould
tCca
4______youlikeaglassofmilkYespleaseAMayBCouldCWould5______youseethesig
overthereSorryIca
’tACa
BCa
’tCShould6______wegototheparkbybusAMayBMustCShall4、行为动词、就是我们平时上课时说的动词，表示某一动作或行为。如：sweep、live等。行为动词我们已学过它们的四种形式：原形、第三人称单数ses、现在分词（也叫动名词）i
g、过去式ed。（1）动词第三人称单数变化规则：A、一般直接加“s”，如：playplaysvisitvisitsspeakspeaks；B、以“s”，“x”，“sh”，“ch”结尾时，加“es”，如：catchcatcheswatchwatches；C、以“辅音字母y”结尾时，变“y”为“i”再加“es”，如：carrycarriesstudystudies。（2）现在分词（动名词）构成规则：A、一般直接加“i
g”，如：gogoi
gdodoi
glooklooki
g；B、以不发音的“e”结尾的单词，去“e”加“i
g”，taketaki
gmakemaki
ghavehavi
g；如：C、以重读闭音节结尾的词r