7、carry on, carry out
carry on意为“进行，继续”，强调一个行为的进行过程。它可以不跟宾语，也可接表示“工作，讨论，竞赛，战斗”等一类的名词作宾语，相当于continue。它另可作“经营”解，相当于manage。如：
Don't let me interrupt you, just carry on.别让我打断你，请继续。
I'll try to carry on the work in spite of difficulties.尽管有困难，但我还是会继续这项工作。Rising costs make it hard to carry on the business.成本上升给生意经营带来了困难。
carry out意为“进行，贯彻，实现”，含有按照某个要求或准则进行的意思。它必须接宾语，且宾语往往是表示“工作，活动，职责，命令，计划”等一类的名词。此词语相当于put into practice。如：
I have some difficulties in carrying out her order.我感到执行她的命令有些困难。
The government was trying to carry out the policy of "family planning".当时，政府正尽力贯彻“计划生育”政策。
8、catch up with, keep up with
catch up with为“赶上（某人或某事）”，有追上并可能超过的含义。如：We'll do out best to catch up with the advanced industrial countries.我们将尽力赶超先进的工业国家。
keep up with作“不落后于（某人或某对手）”解，有与之并驾齐驱的含义。如：The |
