副词: 修饰动词,形容词,副词和整个句子,在句子中主要用作状语,还可以做表语,定语,宾语补足语和介词的宾语。
Is the meeting on?(作表语)
When we got to the top of the hill,we found the sun up.(作宾补)
He feels quite well,and he works so hard.(做状语修饰形容词,副词)
介词:在句中可作定语,状语表语和宾语补足语。
Dear me!The key to the car is missing.I searched all my pockets for it .I wonder if it's in the back of rhe baggage.Unfortunately the key makes me out of the car all the time.(依次:定语,状语,表语,宾补)
连词:用来连接词、短语、从句分句的词.它属于虚词,不能单独作句子成分.连词分并列连词和从属连词两大类.
(第二个and连接两个句子,第一个、第三个and连接两个宾语)