?人教版八年级下册unit8重点短语+section A+B+语法

   【短语归纳】
一个满是宝藏的岛屿an island full of treasures
属于belong to
善待彼此be kind to each other
迫不及待地做某事can’t wait to do sth.
开始意识到come to realize
对……做研究do research class="t_table" style="width:98%">some day指“将来的某一天”，常用于将来时I hope I can be a teacher some day.one day可以表示“将来的某一天”，作此意讲时，可与some day互换；另外它还可表示“某一天”（常用于故事的开头），常与过去时连用We want to visit the moon one day/some day.One day, a thief was caught stealing in the shop. Have you introduced this singer/writer to others?introduce...to...表示“把……介绍给……”。Tom introduced his good friend, Nancy, to me at his birthday party.在汤姆的生日聚会上，他把最好的朋友介绍给了我I hope to see him sing live one day!live此处用作副词，表示“现场直播、现场演出”。TFBOYS is playing live in Shanghai tonight.TFBOYS今晚会在上海现场表演。The Toms must be popular.must此处表示“一定、肯定”，表示肯定的推测，否定推测用can't be“一定不”。Sam must be nearly 90 years old now.Sam如今一定快九十了。However, country music brings us back to the good old days when people were kind to each other and trusted one another.one another意为“互相”，相当于each other。Our sons are different from each other.我们的儿子相互之间不一样。
【语法归纳】
一、现在完成时的定义：
① 表过去发生的某一动作对现在造成的影响或结果。
② 表示从过去开始一直持续到现在, 也许还会继续下去的动作或状态。
二、现在完成时的构成
现在完成时是由“助动词 have(has)+动词的过去分词”构成。
助动词说明该谓语是属于现在时范围。
它和主语的人称、数要保持一致。
过去分词是主要的谓语动词，说明句子的意义。
例句：
He has already finished his homework. 他已经做完作业了。
He hasn't finished his homework yet. 他还没有做完作业。
---Has he finished his homework yet? 他已经做完作业了吗？
---Yes, he has./ No, he hasn't. 是的，做完了。/不，还没有。
三、现在完成时的用法
① 表过去发生的某一动作对现在造成的影响或结果。
---Would you like some bread? 你想要一些面包吗？
---No, thanks. I have had my breakfast. 不，谢谢，我已经吃过早饭了。
（对现在的影响：不饿）
---Why don't you drive to your office? 你为什么不开车去办公室啊？
---Because my car has broken. 因为我的车坏了。
（对现在的影响：车没办法开了）
② 表示从过去开始一直持续到现在, 也许还会继续下去的动作或状态。
He has studied English for 6 years. 他已经学习英语六年了。
Mary has been busy since she came back from Hangzhou.
自从从杭州回来，玛丽一直在忙。
四、常和现在完成时连用的时间状语
① 用副词already和yet。
already一般用于肯定句中，yet一般用于否定句和疑问句中。
We have already finished our homework. 我们已完成作业了。
They haven't finished their homework yet. 他们还没有完成作业。
② 用ever “曾经”和never“从未”。它们多用于否定或疑问句中。
Have you ever been to the Great Wall? 你曾经去过长城吗？
I have never been to the Great Wall. 我从未去过长城。
③ 用表示到说话为止的过去时间状语
如just, before, up to now, so far, until now, in the past few years等。
I have seen her before, but I can not remember where.
我以前见过她，但记不起在哪里见过。
He has been there three times in the last few days.
近几年他去过那里三次了。
④ 用for+一段时间，since+时间点。
I've lived here for 15 years. 我已经在这里住十五年了。
I've lived here since 15 years ago. 自从十五年前我就住在这里了。
Mr. Green has worked here since he came to China.
自从来到中国，格林先生一直在这里工作。