The word 是 shī mean "to be"
我是老师。 Wǒ shì lǎoshī. I am a teacher.
你是商人。 Nǐ shì shāngrén. You are a business person.
您是老师。 Nín shì lǎoshī. You (respected) are a teacher.
他是商人。 Tā shì shāngrén. He is a business person.
她是老师。 Tā shì lǎoshī. She is a teacher.
我们是商人。 Wǒmen shì shāngrén. We are business people.
你们是老师。 Nǐmen shì lǎoshī. You all are teachers.
他们是商人。 Tāmen shì shāngrén. They are business people.
