1

他

tā

(third-person singular) (since the early 20th century, usu. male) he; him; his (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)

2

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)

=3

睡觉

shuìjiào

to go to bed to sleep

=3

睡觉

shuìjué

(archaic, intransitive) to wake up to wake up

=4

吗

má

(coll.) what?

=4

吗

mǎ

used in 吗啡 mǎfēi

=4

吗

ma

(question particle for "yes-no" questions)