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。
Penny tended to work through her lunch hour in an effort to keep up with her work
为了把活儿干完，彭妮常常午饭时间也要工作。
The two saleswomen were busily trying to keep up with the demand.
那两名女售货员正忙着接待顾客。