感官動詞see, hear, watch, feel, notice等后既可接不帶to的不定式作賓補(bǔ)，也可用v-ing形式作賓補(bǔ)。前者表示動作已結(jié)束，后者表示動作正在發(fā)生。試比較：
He saw a girl get on the bus. 他看見一個女孩上車了(上車的動作已經(jīng)結(jié)束)
He saw a girl getting on the bus. 他看見一個女孩在上車(上車的動作正在進(jìn)行)。
在語法的第一講里，我向各位學(xué)員介紹了英語中有關(guān)句子的一些基本情況和“家族”中的一部分成員-----主要是簡單句，在今天這一講里，我將繼續(xù)給大家介紹句子“家族”中的另外一些“成員”——并列句和復(fù)合句。
A. 并列句：(compound sentence)
由兩個或兩個以上相互不依從的句子構(gòu)成。并列句的各個分句之前通常用并列連詞連接，并列連詞前可用逗號，也可不用。其結(jié)構(gòu)為：簡單句+并列連詞+簡單句。
主要并列連詞有：and, but, or, for, so, while, however, either...or, neither...nor, not only…but also, both…and 等
主要并列連詞的用法
1 and: 意為“和，而且”，表示同等關(guān)系或遞進(jìn)關(guān)系
1>. I went there by train and she went there by plane. 我乘火車去那里的，她乘飛機(jī)去那里的。
2>. Her father is a doctor and her mother is a teacher. 她父親是醫(yī)生，她母親是教師。
3>. Tom finished his homework, and they went out to play games. 湯姆做完了作業(yè)，他們就出去玩游戲了。
2 but: 意為“但是”，表示轉(zhuǎn)折關(guān)系。
1>. She is very old but she is in good health. 她年紀(jì)很大了，但身體很好。
2>. He is poor, but he is happy. 他窮，但是他幸福。
3>. The man shouted to the policemen, but they didn't hear him.
4>. Some people don't like summer, but I quite like it. 有些人不喜歡夏天，但是我很喜歡。
3 or: 意為“或者，否則”，表示選擇關(guān)系。
1>. Are you going with us or will you stay at home? 你同我們一起去，還是呆在家里呢?
2>. The students can go swimming or they can go mountain climbing.
學(xué)生們可以去游泳，也可以去爬山。
3>. You'd better go by taxi, or you will be late. 你乘出租車去，否則要遲到了。
4 for:表示“因?yàn)椋硎疽蚬P(guān)系”。是“前果后因”。
1>. He is late for class every day, for he gets up late every day.
2>. We passed the exam, for we studied very hard.
5. so: 因此，也表示因果關(guān)系，是“前因后果?！?BR> 1>. He gets up late every day, so he I slate for school every day.
2>. We studied very hard, so we passed the exam.
6. not only...but also意為“不但……而且”，表示同等關(guān)系。
1>. Not only can he drive a car, but he can also repair cars. 他不但會開車，而且還會修車。
2>. He was not only a good father, but he was also a good husband. 他不僅是個好父親，也是個好丈夫。
7. either...or意為“不是……就是，或者……或者”，表示選擇關(guān)系
1>. You can either do it by yourself or you can ask someone else to do it.
你或者自己做這件事，或者請別人做這件事。
2>. Either the teacher didn't explain the sentence clearly, or I didn't understand it.
不是老師沒有把這個句子解釋清楚，就是我沒有理解。