间

　　lack n. 用作名词构成以下词组：

　　for/ by / from/ through lack of 因缺乏......

　　The project had to be abandoned for lack of money.

　　no lack of不缺乏；很多

　　lack in在......缺乏（不足）

　　lacking adj. 缺少的；不足的

　　There is something lacking in his character.

　　I should say your secretary is lacking in responsibility.

　5. require vt. "需要；要求；命令"常用于以下四种句型：

　　（1）It requires that...要求；必须

　　It requires that I （should） give evidence.

　　（2）require sth. of sb. 对某人有......的要求

　　I'm not guilty. I only did what was required of by law.

　　（3）require sb. to do sth. 要求某人做某事

　　The rules requires us all to be present.

　　注：requirement n. 需求，要求，必要条件，需要的东西，要求必备的条件

　　拓展：在It is/was suggested （ordered，demanded，proposed，etc. ） 结构以及necessary，essential，important，strange，natural等形容词后的主语从句中要使用虚拟语气。如：

　　例题：

　　It is _________________ that all students should wear the school uniform in school, but not all students obey the requirement.

　6. remind vt. "提醒，使想起"常用于以下三种句型：

　　（1）remind...of... 使想起；提醒

　　The film reminded him of what he had seen in China.

　　（2）remind sb. to do sth. 提醒某人做某事

　　Please remind me to return the books to the library.

　　（3）remind sb. that... 提醒某人（做）某事

　　Please remind me that I must call her up before nine.

三. 重点短语：

　1. concentrate on 集中；全神贯注于

　　concentrate one's mind/ attention on （upon） 把注意力集中在

　　With his mobile phone ringing constantly, he can't concentrate on his work.

　　拓展：同义词组：fix one' s attention on

　　focus on

　　be absorbed in

　　如果指较长时间的全心全意做某事，用下面短语：

　　put one's heart into sth.

　　devote oneself to sth. /doing sth.

　　例题：

　　（1）___________________________ your study if you want to catch up with the class.

　　（2）He _____________________ helping the people in need. He set a good example to us.

2. be eager to渴望做某事，热切想做某事