1. 動詞
   及物動詞:
   be動詞第一人稱單數: 是...(人事物)
   值...(數值)
   等於...(人事物)
   

   同義字詞
   breathe,exist,live,subsist
   bear,lie,sit,stand
   grade,place,rank,rate,stand
   befall,betide,chance,come,come about,come down,come off,cook,do,go on,happen,occur,pass,transpire
   

2. 助動詞
   被...(過去分詞...)
   正在...(動詞ing...)
   在...(動詞ing...)
   

3. 縮寫
   早上(Ante Meridiem)
   調幅(Amplitude Modulation)
   元素鋂(Americium)
   

例句

1. Hang on, where am I?
2. What kind of dog am I?
3. I am in a good mood now.
4. I am not saying "shut up".
5. I am a better cook than you.
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