1、Unit 4 Then and nowLets learn&Find the mistakesPart ALets learn dining hall gymgrassNew words years ago months ago last year last monthgrassdining hallgymNow theres a new one in our school.There was no gym in my school twenty years ago.课 文课文讲解ago的用法ago用作副词，意为“以前”，在句中不能单独使用，它的前面必须要有一个表示时间的词或词组，ago词组用
2、于一般过去时。ago的常见短语two weeks ago 两周以前three years ago 三年前a few days ago 几天前a long time ago 很长时间以前there be 句型句中的theres 相当于there is，其中there不是指“那里”或“在那边”，而是与is一起构成there be 句型,表示“（某处）有某物或某人”。它的基本句型为：There be(is/are)+主语（人/物）+其他.注意:该句式中只有一个主语，主语为单数或不可数名词时，be动词用is；主语若为复数，be动词用are。例如：There are many hills in the
3、park.公园里有很多座小山。该句式中有几个并列主语，则谓语动词按就近原则处理，即与靠近be动词的第一个主语保持一致。例如：There is a blackboard,many desks and chairs in the classroom.教室里有一块黑板、一些书桌和椅子。Find the mistakesIn the Tang dynastyExercise1.We can play football in the _.2.Here was a tree ten years _.3.We can have lunch in the _.4.Dont walk on the _.一、选词
4、填空。dining hall gym grass agodining hallgymagograss二、连词成句。1.was,school,gym,in,There,no,my (.)_ 2.couldnt,the,People,Internet,use (.)_3.by,go,People,bus,didnt,(.)_There was no gym in my school.People couldnt use the Internet.People didnt go by bus.Homework Introduce your school to your parents.Tell them the changes between the past and now.(use the sentence pattern“there be”)
