职称英语考试词汇精析，动词不定式用来作状语。 　　They ran over to welcome the delegates.
　　他们跑过去欢迎代表们。
　　To protect his comrades, he heroically laid down his lif.
　　为了保护同志们，他英勇地献出了自己的生命。
　　She decided to work harder in order (so as) to catch up with the others.
　　她决定加紧学习好赶上别人。