一个英语语法问题Be sure to pay attention to protecting the environme

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一个英语语法问题
Be sure to pay attention to protecting the environment and think of others when traveling.其中,when traveling 是when they are traveling 为什么可以这样简写?

可以这样理解的,当主句的主语和从句的主语一致时,可以省略从句的主语和部分谓语（基本上都是be动词）,不去的话是状语从句,去掉的话就是非谓语动词分词作状语,再如
While (you are) listening,please take some notes

一个英语语法问题Be sure to pay attention to protecting the environme 英语语法问题 be sure to do用法 MORE AND MORE ATTENTION ()to the protection of our environme 英语语法问题：为什么pay attention to doing sth try to do sth和would lik we must pay attention to protecting our environment.这里的"prot Dear,please pay attention to the pay attention to the following things. pay attention to.翻译 pay attention to是什么意思? pay attention to同义词 pay attention to造句? pay attention to