She was skipping to keep up with him.
她连蹦带跳地走着，好跟上他的'步伐。
I can't keep up with all the changes.
我并非所有的变化都能跟得上。
She is struggling to keep up with her schoolwork.
她在努力完成作业。
She did not bother to keep up with the news.
她不愿花时间去了解最新消息。
Many people were holding down three jobs just to keep up with the Joneses.
许多人同时做3份工作只不过是为了和别人攀比。