八年级下英语第3单元单词解析.ppt

单词讲解 sweep 1.swept;swept 2 sweep the floor; sweep away 扫走 3. I sweep the floor every day. Please clean the room. mess The room was in a mess. =There was a mess in the room. 2. You can make the cakes in the kitchen, but you can not make a mess. 3. You messed up my life. throw 1 threw; thrown 2 throw about 乱扔 throw at 扔向 throw sth to sb /throw sb sth 将某物扔给某人 neither 作形容词或代词，意为“两者都不的” Neither answer is correct. Neither of …+复数名词/代词 两者都不 Neither of the students is in the classroom. Neither …nor… 两者都不（ 就近原则） Neither you nor he goes to the park. Neither +be 动词/情态动词/助动词+主语 …也不 He does not like apples. Neither does he. They can not swim. Neither can I/Me neither She is not working. Neither is he. I can’t swim. Neither can I.= Me neither. They didn’t do homework. Neither did I. He has not done his homework. Neither have I Neither has she. have/has +过去分词 pass 1 为动词，“经过” 过去式 passed She passed me in the street. 她在街上从我身旁经过。 注：past 也表”经过“，但是为介词 2 pass sb sth / pass sth to sb 把某物传给某人 3 pass on 传递 　when 和while的用法区别 when引导的时间状语从句中的动词可以是非延续性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。 判断对错 She was crying when her mother arrived home. She was crying while her mother arrived home. 由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，while 也可表转折 While we were talking, the teacher came in. They were singing while we were dancing. I am ugly while she is pretty. 改错 1.She is fat but I am thin. 2.It was raining while we arrived. 3.I dont know them well，while they are my neighbors. waste 1.It’s a waste to throw away all this food. 把这些食物都扔了是浪费。 2. We shouldn’t waste a drop of water or a grain of rice. 我们不应该浪费一滴水一粒米。 provide provide sb with sth 为某人提供某物 provide sth for sb 为某人提供某物 provide for sth 为某事做好准备 provide for sb 赡养某人 provide that +从句 规定；预先约定… anyway 而且；加之 I don’t want to see the film and anyway I haven’t got any money