大学英语：not only…but also （不但……而且）

　　1. not only…but also （不但……而且）

　　例：To some people language learning is not only time-consuming, but also difficult.

　　You can find the place not only with the help of a map, but also by asking the way.

　　2. up and down （上上下下，前前后后）

　　例：His eyes moved up and down the rows of people, looking for the escaped prisoner.

　　He walked up and down the street, not knowing what decision he should make.

　　3. neither…nor （既不……也不）

　　例：Neither you nor I should be responsible for this accident.

　　This book is neither interesting nor instructive.