词形变化
原形过去式过去分词现在分词三单形式
run ran run running runs
runner cn. 跑步者，奔跑的人
running作定语的用法：
Running Man 跑男(综艺节目）
running shoes跑鞋
running star跑步明星
running water流动的水
running nose流鼻涕
running race赛跑
running car行驶的小汽车
run作为动词的几个常用意思：
① 跑
He runs faster than I.他跑得比我快。
②流动
The river runs quickly, we can't cross it.
这条河水流湍急，我们过不去。
③经营
Mr Smith runs a big company.
史密斯先生经营一家大公司。
④运转
The machine runs well.
这台机器运转良好。
常用重点短语
① run( to)跑去……
Tom ran to school yesterday.
昨天汤姆跑步去上学。
Tom ran home yesterday.
昨天汤姆跑步回家。
②run after =chase 追赶
He is running after a small dog.
他在追一只小狗。
③ run away (from)离开，逃离 ；躲避，逃避
He wanted to run away, because he can't stand any more.他想离开，因为他再也忍受不了了。
run away from躲避，逃避
You shouldn't run away from your difficulty.You should face it bravely.
你不应该逃避困难。你应该勇敢面对。
④ run out用完，花完。一般情况下，sth作主语，句子用主动语态，它没有被动语态。
My money has run out.我的钱花完了。
=My money has been used up.
⑤ run out of用完，花完，有主动语态和被动语态。
I have run out of my money.我的钱花完了。
=I have used up my money.
=My money has been run out of.
⑥ run along 绵延，延伸
The Himalayas run do along the southeastern part of China.
喜马拉雅山脉绵延于中国的东南部。
⑦ run on靠……运转/驱动
The machine runs on electricity.
这台机器靠电运转。
