巧学妙记——介词from的用法

        介词，是一种虚词，它后面必须接名词（代词），名词作介词宾语，共同构成介词短语，可以在句中作主语、宾语、谓语以外的句子成分。介词的选择，非常麻烦，极其繁杂，很难像其他语法项目一样，做出概括性的归纳。但是了解介词的基本意义，是学好介词的首要的一步。下面，我们就逐个向大家介绍介词的基本意义和用法。       

 
        今天要学习的是介词from的用法。

        一、from表示的是“起点、来源”How do you get from here to Shanghai? （这儿是起点）I got the information from a friend of mine. (来源)

         二、一件事情发生的起点——原因I felt much too tired from the long walk to the town. (from表示疲劳的起点——原因)The man died from starvation. (因饥饿而死)He suffered from a big loss of money. (suffer的原因是a big loss of money)You can benefit a lot from the building of the bridge.

          三、既然是起点，应该就是“离开，不在”了His absence from the meeting caused much anger. (表示离开，不在)I’m afraid that he is now away from home at present.( 不在，离开)

          四、既然是“离开”，那么下面的from是什么意思呢？The umbrella can protect you from rain.You should stop/prevent/keep him from doing that again.I will keep you safe from harm as possible as I can.

           五、from与一些动词、形容词、名词等构成的短语，都可以运用from的基本意义去理解tell/distinguish sth from sth else free from result frombe made from excuse oneself fromescape fromhear fromapart from