连词主要用于单词、短语或句子之间，它们起连接作用。连词分为并列连词和从属连词。
（一）重点
一、 不定式
１、定义；具有名词、形容词及副词性质并具有时态、语态变化。
２、形式（以do为例）
主动语态 被动语态
一般时 to do to be done
进行时 to be doing
完成时 to have done to have been done
完成进行时 to have been doning
３、用法；
（１） 用作主语；
To speak good English is not easy。
Or：It is not easy to speak good English（采用形式主语it以免头重脚轻）
It took me an hour to do the work。
（２）用作宾语；
She decided to take the examination。
I hope to meet him soon。
（３宾语补足语；
They expected us to help them。
He wants this son to study hard。
金牌重点；
不定式作宾补，如谓语动词是感官动词，使役性动词（see，hear，notice，watch，maks，have，let…），则不定式符号“ｔo”须省略，但在被动语态中不能省。
I heard then sing in the ciassroom
I made her clean the room
The girl is heard to sing an English song。
（４）用作表语；To teach is to learn
His job is to sell cars。
（５）用作状语，表示目的，结果。
We come to school to study English（目的）=in order to