=1

你

nǐ

you (informal, as opposed to courteous 您 nín)

=1

你

nǐ

you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)

=2

兒子

érzi

son

=2

兒子

érzǐ

Term of self-address, used by a man when speaking to elders. baby; infant; newborn child

3

在

zài

to exist; to be alive (of sb or sth) to be (located) at (used before a verb to indicate an action in progress)

4

上大

Shàngdà

short for 上海大學／上海大学 (Shànghǎi Dàxué, “Shanghai University”)

5

學

xué

to learn to study to imitate science -ology

=6

嗎

má

(coll.) what?

=6

嗎

mǎ

used in 吗啡 mǎfēi

=6

嗎

ma

(question particle for "yes-no" questions)