Step 7 homework

Recite the article. You can use the sentences according to the keys of 3b.

Step 2 精讲点拨

现在完成时

表示从过去已经开始持续到现在的动作或状态，可以和表示"从过去某一时刻延续到现在的一段时间状语"连用，如"for + 时间段"、"since + 过去时间点"、"since + 过去时的从句"、"since + 一段时间 + ago"。且for与since引导的时间状语可以相互转换。

　e.g. My uncle has worked at this factory for ten years.

　= My uncle has worked at this factory since ten year ago.

　　I've lived here since 1990．

　　自从1990年以来我就住在这里。

　　I haven't seen him for three years.

　　我三年没有看见他了。

　　She's been at this school since five years ago.

　　自从五年前以来她就在这个学校。

Section B 1a～1d

学习目标：

★知识目标：

掌握本课单词和短语

search among crayon shame regard.. as count century according to opposite especially memory consider hold

★能力目标：

能从阅读中获得自己周围的事物变化的相关信息。

★情感目标：

珍惜自己周围事物的变化，感恩社会，汇报社会，关爱他人。