主语在句子的作用(主语从句作用)
see sb. doing sth. （现在分词） 下面就来看下今天小编给大家带来的主语在句子的作用
| ③ The classroom is always kept clean every day.
| see sb. doing sth. （现在分词）
| ③使役动词 have, get, make, leave, keep 等后，可用过去分词作宾语补足语。例如：
| ④ The vase is thought as broken.
| They stood listening to him.
| The soup tastes wonderful. (taste 为系动词，意思为“尝起来，吃起来”，意思基本未变。)
| I tasted the soup. ( taste 为及物动词，意思为“品尝”。)
| Lucy is writing a letter now.→A lette r is being written by Lucy now.
| little ,old 和young 有时可以作为名词短语不可分割的一部分,所以可以
| I stand before you today the representative of a family in grief.
| 使用被动语态应注意的几个问题：
| 几种用过去分词作宾语补足语的情况说明：
| have sb. do sth. （无to 不定式）
| 如果是接双宾语的动词改为被动语态时，直接宾语(物)作主语，那么动词后要用介词，这个介词是由与其搭配的动词决定。
| 英语中的非限制性定语从句所表达的信息,在汉语里一般由另一个小句来表达。用非限制性定语从句时，前应加逗号，并且非限制性定语从句引导词只能用which，不能用that。
| The morning dawned fresh and clear after the storm at night.
| ③ English is considered of great importance for us.
| ② The news is considered as true.
| ②在使役动词后作宾语补足语，不定式不带to。有些动词跟不定式作宾语补足语时省去了to，这些动词有：一感二听三让四观看。
| 在表示心理状态的动词后作宾语补足语。这类动词有：consider, think,
| 四观看：observe, see, watch, look at
| At the news, he went mad. (go为系动词，失去了“go”的原义，意为“变得”。)
| You must lock the door when you leave.→the door must be locked when you leave.
| make our country beautiful (adjective)
| 描述身体特征的形容词先于表示情感和性格特征的形容词
| ③ The glass was found broken.
| 怎样把主动语态改成被动语态?
| ① The dog is called Karl.
| ask sb. to do sth.（有to 不定式）
| I saw her with them, at least, I thought it was her.
| He has written two novels so far.→Two novels have been written by him so far.
| 一个世纪过去了,在这期间这个国家不断遭受战乱之苦。
| ① The books in the study must be kept in good order.
| ①表示“意欲；命令”的动词如 like, want, wish, order 等，可用过去分词
| ① English is taken as a useful means for research work.
| ① He is often heard reading English.
| ①help后面作宾语补足语的动词不定式可以带to也可以不带to。
| 动词elect, call, name, make, find, leave等后面常接名词用作主语补足语。例如：
| The parcel arrived in good condition.
| ② Ice is known to be in a solid state.
| 定语后置（1）短语作定语一般后置
| 名词性或名词化的词、词组或短语:
| ① The door was painted white.
| 英语的复合句中,分句以其主句为基干,通过连接手段,一层一层地展开,就好
| 感官动词see, watch, hear, notice, feel, make等后面接带to的不定式用作主语补足语。例如：
| 现在进行时的被动语态构成：am / is / are + being + 及物动词的过去分
| ② The professor was seen making an experiment in the chemistry lab.
| ① He was seen to come upstairs.
| 同位语除表示其同位成分的全部意义外,还可以表示部分意义。
| 二听：hear, listen to
| call him Lao Li (noun)
| 由what引导的名词性从句用作主语补足语。例如：
| as后面接名词、形容词、分词等用作主语补足语。例如：
| 感官动词或使役动词使用省略to的动词不定式，主动语态中不带to ，但变为被动语态时，须加上to 。
| We parted the best friends.
| find sb. at home (Prep. phrase)
| ①意为“主语请别人做某事”。例如：
| 被动语态的主语补足语与主动语态的宾语补足语是密切相关的。例如：
| 一般过去时的被动语态构成：was / were + 及物动词的过去分词
| have sth. done. （过去分词）
| 如同位语与其同位成分关系紧密时不用逗点隔开;如同位语对其同位成分只作补充解释时可用逗点隔开。
| They separated with feelings alienation.
| 现在完成时的被动语态构成：has / have + been + 及物动词的过去分词
| They will plant ten trees tomorrow.→Ten trees will be planted by them tomorrow.
| At twenty-four, Tom went half-bald. ( go 为系动词，失去原义。)
| ②意为“主语遭遇、遭受某一不愉快、不测的事情”。例如：
他们生来贫穷，活得贫穷，死得也贫穷。