◎一般句式 例：He came here at 5 pm.yesterday.
◎否定句 例：He did not come here until 5 pm.
◎倒装句 例：Not until/till 5 pm.did he come here
◎强调句 例：It was not until/till 5 pm.that he came
表列举：for example、for instance、that is to say
表对比：on the one handon the other hand
in spite of
表原因：because of、thanks to、due to、owing to
表结果：therefore、thus、as a result、so
表结论：to conclude、in a word、in brief、to sum up
－We are good friends and we should help each other.(并列连词)
－As we are good friends，we should help each other.(从属连词)
－Being good friends，we should help each other.(非谓语动词)