小學(xué)英語句型轉(zhuǎn)換——肯定句變否定句一、概念：什么是肯定句和否定句？｛肯定形式→肯定句否定形式→否定句陳述句陳述句：說明一件事情、一個想法，提出一個觀點或表達自己心情的句子。特點是：句末都是句號，用降調(diào)讀！肯定句變否定句的方法1.含“be動詞和情態(tài)動詞”型，直接在be動詞或情態(tài)動詞后加not,其它照抄不變。be動詞包括：am,is,are,was,were.常見的情態(tài)動詞有：can,could,would,will,may等等。例句：Iamastudent.→

Iamnotastudent.→→Heisaboy.Heisnot/isn'taboy.IcanspeakEnglish.Icannot/can'tspeakEnglish.肯定句變否定句的方法注意縮寫：

isnot=isn't,arenot=

aren't,wasnot=wasn't,werenot=weren't,amnot沒有縮寫，但是Iam=I'mcannot=can't,wouldnot=wouldn'tcouldnot=couldn't,willnot=won't肯定句變否定句的方法2.含“實意動詞”型，轉(zhuǎn)換否定句時，記住五個字“一加一還原”的原則?！耙患印奔丛趯嵰鈩釉~前加助動詞的否定don't,doesn't或didn't?！耙贿€原”即把句中的實意動詞變回原形。注意：在一般現(xiàn)在時中，當(dāng)主語是第一、二人稱或復(fù)數(shù)時，加don't來否定；當(dāng)主語是第三人稱或單數(shù)時，加doesn't來否定；在一般過去時中，一律用didn't來否定。例句：Ilikeapples.→→→Idon't

likeapples.Helikesapples.Hedoesn'tlikeapples.Sheworkedlastnight.Shedidn't

worklastnight.肯定句變否定句的方法要注意的特殊情況：遇到some

變any;遇到too/also變either;遇到and

變or;遇到always

變never。例句:1.Therearesomeboysintheclassroom.Therearen't

anyboysintheclassroom.2.Thegirlcansinganddance.Thegirlcan'tsingordance.相關(guān)練習(xí)：1.Mikewouldlikesomechicken.→Mike______like______chicken.2.He

often

goes

to

bed

at

ten.→Heoften___________tobedatten.3.Maryisateacher,too.→Mary______ateacher,_______.4.TheywenttoShanghaiyesterday.→They___________toShanghaiyes