mean,tell,fly,ring,run,use,fall,hear的一般现在时,现在进行时,过去式的变化fly的单数第三人称S怎么加啊,你们怎么都不回答啊

一般现在事就是这样,单三：means,tells,rings,runs,uses,falls,hears进行时：meaning,telling,flying,ringing,running,using,falling,hearing过去时：meant,told,flew,rang,run,used,fell,heard