本Module中较难理解句段:

（1）It's easier to learn a foreign language. （给出 It’s +adj. +to do sth.的解释）

It’s + adj.+ for sb. to do sth.结构是一个陈述句, 表示说话人对客观事件的决断, 比较正式,希望大家学习时注意。

（2）She's studied it for a year. (给出本句解释，提示学生注意此为完成时缩写 she has...。)

这句话是She has studied it for a year.的缩写，意思为她已经学英语一年了。

（3）Since 1989 Project Hope has built schools all over China.

　Since 用来说明动作起始时间，for用来说明动作延续时间长度。
　　I have lived here for more than twenty years.
　　My aunt has worked in a clinic since 1949.　  
　　I have known Xiao Li since she was a little girl.　 
　　My brother has been in the Youth League for two years.　
　　I have not heard from my uncle for a long time.
也就是说for 接一个时间段，since+时间起点(具体过去时间,如:1999; last+时间; 一段时间+ ago;一般过去时从句).
如: I have been here for over 10 years. I have been here since 10 years ago。

（4）That sounds interesting. (解释sound作为感觉动词的意思，并给出feel, look, taste,等感觉动词的用法和例句。)　

see, hear, feel, watch, look,这五个动词均可作连系动词，后面接形容词作表语，说明主语所处的状态。其意思分别为"看/听/闻/尝/摸起来……"。
除look之外，其它几个动词的主语往往是物，而不是人。    
例如：
These flowers smell very sweet.这些花闻起来很香。
The tomatoes feel very soft.这些西红柿摸起来很软。