=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

不

bù

no; not so (bound form) not; un-

3

应该

yīnggāi

ought to; should; must

4

在学

zàixué

to be at school; to be studying

=5

习

Xí

surname Xi

=5

习

xí

(bound form) to practice to study habit custom

=6

吗

má

(coll.) what?

=6

吗

mǎ

used in 吗啡 mǎfēi

=6

吗

ma

(question particle for "yes-no" questions)