是 · shì · to be (followed by substantives only)

你是新学生吗？

Nǐ shì xīn xuésheng ma?

Are you a new student?

今天是二月二日。

Jīntiān shì èr yuè èr rì.

Today is February 2nd.

昨天是星期日，我没有上课。

Zuótiān shì xīngqīrì, wǒ méiyǒu shàngkè.

Yesterday was Sunday, and I did not have class.

请给我你的电话号码，最后一个数字是零。

Qǐng gěi wǒ nǐ de diànhuà hàomǎ, zuìhòu yí ge shùzì shì líng.

Please give me your phone number; the last digit is zero.

家里没有菜，这不是大事。

Jiā lǐ méiyǒu cài, zhè bú shì dà shì.

There is no food at home; it is not a big problem.

我是大学生，每天八点上学。

Wǒ shì dàxuéshēng, měitiān bā diǎn shàngxué.

I am a university student, and I go to school at eight every day.

今天是第六课。

Jīntiān shì dì liù kè.

Today is Lesson Six.

这些孩子是我的朋友，他们下午一起玩。

Zhèxiē háizi shì wǒ de péngyou, tāmen xiàwǔ yìqǐ wán.

These children are my friends; they play together in the afternoon.

她们都是小学的小学生。

Tāmen dōu shì xiǎoxué de xiǎoxuéshēng.

They are all primary-school students.

我家有四口人：爸爸、妈妈、姐姐和我。这些都是我的家人。

Wǒ jiā yǒu sì kǒu rén: bàba, māma, jiějie hé wǒ. Zhèxiē dōu shì wǒ de jiārén.

There are four people in my family: Dad, Mom, my older sister and me. They are all my family members.

我哥哥在公司工作，弟弟还是学生。

Wǒ gēge zài gōngsī gōngzuò, dìdi hái shì xuésheng.

My older brother works at a company, and my younger brother is still a student.

这是小李的女朋友，那是小王的男朋友。

Zhè shì Xiǎo Lǐ de nǚpéngyou, nà shì Xiǎo Wáng de nánpéngyou.

This is Xiao Li's girlfriend, and that is Xiao Wang's boyfriend.