She was skipping to keep up with him.

　　她連蹦帶跳地走著，好跟上他的步伐。

　　I can't keep up with all the changes.

　　我并非所有的變化都能跟得上。

　　She is struggling to keep up with her schoolwork.

　　她在努力完成作業(yè)。

　　She did not bother to keep up with the news.

　　她不愿花時間去了解最新消息。

　　Many people were holding down three jobs just to keep up with the Joneses.

　　許多人同時做3份工作只不過是為了和別人攀比。