2024年冀教版八年级英语下册Unit4 Lesson 21课件.pptVIP

Lesson21:

BooksorComputers?;Learningaim:

1.Learnaboutthehistoryofthebooks.

2.Knowaboutthefountainoftheprintingpress.

Learningimportantpoints:

1.Whyistheprintingpressimportant?

2.Howdidbookschangeinformation?;;ThinkAboutIt;Language

Points;1.Inancienttimes,therewerenobooks,andpeoplepassesontheirknowledgebytellingstories.在古代，没有书，人们通过通过讲故事传递知识。

by是介词，后面可以加名词或动名词短语，意为“通过……方式（途径）”。如：

IlearnEnglishbylisteningtotapes.我通过听磁带学英语。;2.Ittookalongtimetowritejustonebook.仅仅写一本书就要花费很长一段时间。

句型Ittakessb.sometimetodosth.?意为“某人花费多长时间做某事”，it是形式主语，真正的主语是动词不定式“todosth.”；take随时态改变，本句用的是一般过去时态，所以用took。如：

Ittookmetwohourstocleanmyhouseyesterday.我昨天用了两个小时打扫房子。;链接：;P3;Exercises;I.根据所给汉语提示，完成下列句子。

1.Acomputerisauseful_______(机器).

2.Therearetwo________(印刷)pressesinourschool.

3.Whatsthemeaningofthesecond_________(段落)inthetext?

4.________(哪一条)wayshallwego?

5.Iboughtabookabout_______(现代的)historyyesterday.;II.用所给单词的适当形式填空。

1.IthinktheInternetis______________(important)thantheprintingpress.

2.Thenovel__________(write)byQiongYao.

3.Wecanfindinformation______(quick)ontheInternet.

4.Themachinecanmake__________(thousand)ofbooksaday.

5.Ifyou______(forget)thetelephonenumber,youcouldlookitupinthebook.;III.连词成句。

1.hand,the,by,model,was,plane,made

__________________________________.

2.get,how,you,information,did,the

__________________________________?

3.the,answer,English,questions,in,please

__________________________________.

4.the,Internet,people,lets,quickly,information,search,for

_______________________________________.

5.much,sound,travels,than,faster,light

__________________________________.;