The best-known and most frequently used conjunctions are the coordinate．The six most common ones are and，or，nor，for，but，and yet．They connect sentence items of equal grammatical ranks—nouns to nouns，verbs to verbs，and noun clauses to noun clauses．

连词中最常见的是并列连词。常用的并列连词有and，or，nor，for，but，yet等，连接句中的成分或并列的从句。

Kate and Susan sent application letters to Google China．

Who offers better service:Bank of China or Commercial Bank?

The personnel manager neither confirmed nor dismissed his resignation．

Vincent has not seen the final fiscal-year report，nor have I．