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. 不定式作状语）
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)
