學習英語一定要結合例句，背口訣也是一樣，例句能幫助我們更好的理解口訣，讓口訣變得更加具體，更加利於理解。
be 動詞的用法口訣:
我（I）用am,
你（you）用are,
is連著他（he）,她(she),它(it)
單數名詞用is,複數名詞全用are
I am hungry.
You are right.
She is my teacher.
This dress is beautiful.
Those two dresses are both beautiful.
They are good friends.