八年级下册Unit8英语知识点.docVIP

八年级下册Unit8英语知识点 1、island 岛 on the island 在岛上 an island 一个岛屿 2、full of 满是……的， 充满……， 装满……。 （1）后边常常接名词，full of 与后边的名词一起构成后置定语，修饰前边的名词。full of 相当于filled with 例句：the basket full of apples. the cup full of water . full of 前边也可以与be动词连用，在句中做谓语。be full of相当于be filled with. 例句：The classroom is full of students.= The classroom is filled with students The box is full of apples.= The box is filled with apples. 3、already与yet （1）already “已经” 常用于现在完成时的肯定句中，常放在have/has之后、过去分词之前或句末。 例句：They have finished their homework already . The train has left already . （2）yet “已经” 用于现在完成时的疑问句中。 例句：Have you eaten yet ? Have they read this book yet ? yet “还” “尚” 用于现在完成时的否定句中。 例句：He hasn’t done his homework yet . The train hasn’t arrived yet . （4）not yet 还没有 常用于回答现在完成时的一般疑问句。 例句：Have you eaten yet ? Not yet. 4、英语中，疑问词what/how/which/where/who/when 后边出现动词时，往往用“疑问词 + to do sth ”结构，此结构在句中可以做主语、宾语和表语. 例句：I can’t decide when to start . please tell me what to do next . He doesn’t know where to live . Do you know which to buy ? 5、finish doing sth 做完某事 例句：Did you finish watching TV ? I have finished cleaning the room . 6、put down 放下 down是副词，接代词时，代词要放在中间。 例句：Your bag is very heavy ,please put it down . 7、page 页 表示第…页时，用page + 数字 例句： page 18 18页 page 42 42页 8、in + 一段时间 在……后，常用于一般将来时。 例句：They will be back in three days . after + 一段时间 在……后，常用于一般过去时。 例句： He went to Beijing after three days . 9、cut down砍倒 down是副词，接代词时，代词放中间 例句: The trees are important, Don’t cut them down. 10、learn to do sth 学习做某事 learn from 向……学习 例句：We should learn from that boy . When did you learn to play the piano ? 11、else 别的 其他的 常放在疑问词和something/anything/nothing等词的后边。 例句：What else can you do ? I have something else to say. 12、how long 与 how soon （1）how long 多长时间 常用于对“for + 一段时间”或“since + 过去的时间点”提问，主要用于一般过去时或现在完成时。 例句：How long did you study English ? I studied English for 2 years. How long have you lived here ? I have lived here since last year . （2）how soon 多久