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动词性谓语句主要作用是什么?

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动词性谓语句主要作用是什么?
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答案和解析
谓语动词有行为动词,系动词,情态动词和助动词,行为动词包括及物动词和不及物动词.比如 I see a girl.see就是动词,这里作谓语.
还有一个概念是非谓语动词,谓语动词与非谓语动词相对应的概念.两者都是动词,但是前者是作谓语成分,后者不能作谓语成分.而谓语成分就是用来说明主语的动作或状态的,一般由动词或短语动词承担.非谓语动词有着动词不定式,动名词,现在分词和过去分词.
谓语动词和非谓语动词的区别
1) 谓语动词在句中可单独作谓语,而非谓语动词不能单独作谓语.
Miss Mary teaches us English.玛丽教我们英语.(teaches 动词作谓语) Mr.Victor came to our classroom to have a talk with us last week.维克托先生上周来到了我们教室和我们谈话.(to have a talk.不定式作谓语)
2) 谓语动词受主语的人称和数的限制,而非谓语动词形式没有这种限制.Larke likes the pop music.拉克喜欢流行音乐.(动词用单数第三人称形式)
Larke has nothing to do today.拉克今天没什么事要做.(do 用原形)
非谓语动词的特征
1.如果非谓语动词是及物动词,后面须跟宾语.
Studying English is my favorite.
学习英语是我的爱好.(studying 后跟宾语)
To help him is my duty.帮助他是我的责任.(help 后跟宾语)
2.非谓语动词可以带有自己的状语或逻辑主语.
Working under such a condition is terrible.
在这样的环境下工作太可怕了.(under such a condition 是 working 的状语)
It's too difficult for him to master English in such a short time.他在这么短的时间内掌握英语太难了.(for him 作不定式的逻辑主语) 3 非谓语动词仍有语态和时态的变化.
I am sorry to have kept you waiting long.
对不起让你久等了.(to have kept...是不定式的完成形式)
Seen from the mountain,the city looks much more beautiful.
从山上看,这座城市美丽多了.(Seen from...是分词的被动形式)
4.非谓语动词在句中可以当成名词或者形容词来使用.
Our coming made him happy.
我们的到来使他很高兴.(coming 起名词作用)
There are two big swimming pools here.
这儿有两个大型游泳池.(swimming 起形容词作用)