Exposed in the sun for a long time,the door of those poster

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/21 11:53:01

Exposed in the sun for a long time,the door of those poster has gone.
Being exposed in the sun for a long time will have bad effects on us.
这类句子英语老师说句子中间有逗号开头用ed,无逗号用ing是怎么回事?为什么有的句子又不是这样的,很疑惑啊

Exposed in the sun for a long time这个是做状语的,表示原因需要用逗号隔开
Being exposed in the sun for a long time这个是非谓语动词用来作主语~所以不用逗号的~
再问：为什么第一句前面不加be动词第二句就加了呢？只要做状语都是非谓语吗？
再答：嘿嘿，因为过去分词本身就表示了被动的含义，做状语时不需要动名词，因此没必要写成being exposed，这很赘余，英文是讲究简便和避免重复的，所以第一句就不用了。但是过去分词不能当主语，只有动名词才能当主语，如果直接变成exposing，那么就成了主动的含义，因此需要用be来帮忙，构成被动式。being exposed 即表示了动名词形式，也表示了被动的含义。所以这里的being不能省略，而且必须要加上。非谓语是一个语法概念，状语也是一个语法概念，状语不仅仅只有非谓语可以充当，还可以用句子、副词等等，非谓语除了可以做状语也可以做定语等等，这里只是其中的一个交叉点，恰巧是非谓语做了状语。所以不能说做状语都是非谓语，反之也不成立。

Being exposed to the sun for too long is bad for our skin.主语 for a long time与in the days of long ago意思相同吗? a poster in the hall ______to the sun,rain and wind for a long time,the stone spl write a poster for the Great Wall of China. ( )for a long time, most of the crops in this area died from 3._______ for a long time,most of the crops in this area die _____ for a long time, most of the crops in this area died f 19 ._____ for a long time,most of the crops in this area die _____ for a long time,most of the crops in this area died fr 非谓语英语问题C19 ._____ for a long time,most of the crops in this 1.He had been knocking at the door for a long time,but no on