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1、小学阶段现在进行时的结构和用法一、概念现在进行时表示说话时正在进行或发生的动作,也可表示当前一段时间内的活动或现阶段正在进行的动作．结构：助动词be(am/is/are)+现在分词.二、现在分词的构成：1.大多数动词后可在动词后直接加-ing． Eg:carry-carrying,catch-catching,drink-drinking,enjoy-enjoyinghurry-hurrying,do-doing,read-reading,think-thinking2.如果动词以-e结尾,则去掉-e,再加-ing, 如come-coming,have-havin
2、g,make-making,ride-riding,write-writing,take-taking,use-using．3.如果动词只有一个元音字母,而其后跟有一个辅音字母时,将此辅音字母双写,再加-ing 如：hit-hitting,let-letting,put-putting,run-running,sit-sitting．4.如果动词有两个音节,且重音在第二个音节上,则末尾的辅音字母须双写,再加-ing, 如:for’get-forgetting,pre’fer-preferring,up’set-upsetting．试比较’benefit/benfi
3、ting,’differ/differing,’profit/profiting,这些词的重音在第一个音节上,因此其末尾的辅音字母不双写．5.以-ic结尾的动词,应先把-ic变为-ick,再加-ing,eg:panic/panicking,picnic/picnicking,但lie/lying,die/dying,tie/tying是特殊变化要记住．三、句型结构：1.现在进行时的肯定形式、否定形式、疑问形式及其回答,所有变化都体现在助动词be(is/am/are)上．①现在进行时的肯定形式：主语+be(am/is/are)+doing+其他成分 Iamsing
4、ing.Theyarewriting.②现在进行时的否定形式:主语+be(am/is/are)+not+doing+其他成分 Iamnotsinging.Theyaren’twriting.③一般疑问句及回答：be(am/is/are)+主语+doing+其他成分 AmIsinging?Yes,youare./No,youaren’t. Aretheywriting?Yes,theyare./No,theyaren’t.④特殊疑问句及回答:特殊疑问词+be(am/is/are)+主语+doing+其他成分 Whatareyoudoing?Weareplay
5、ing(要求就提问内容具体回答).2.缩写形式如下: Iam---I’mYouare---You’reHeis---He’sSheis---She’s Itis---It’sWeare---We’reTheyare---They’re3.说明:不是所有动词都能用现在进行时态的,如：see、like、want、know等动词往往都不用进行时态．练习一.用现在进行时完成下列句子:1.______you__________(fly)akite?Yes,_______.2.______you___________(sit)intheboat?3.______he___
6、__________(talk)withme?4.We_______________(play)footballnow.5.What_________you__________(do)?6.I_____________(sing)anEnglishsong.7.What________he____________(mend)?8.He______________(mend)acar.9.Theseboys_________(play)tennisontheplayground.10.Mymother______________(cook)inthekitchen.
7、11.Wecan’thelpyou,becausewe____________(have)classes.12.________theboy___________(write)hishomework?13.Look!Thesebutterflies_________(fly)inthesky.14.Listen!Thegirl___________(sing)inthenextroom.15.Thenaughtyboy__________(swim)intheriver. 二.选择1.Look.Lucyis_____anewbiketoday. A.jumping
8、 B.ru
