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

發生

fāshēng

to happen; to occur; to take place; to break out

=3

了

le

(completed action marker) (modal particle indicating change of state, situation now) (modal particle intensifying preceding clause)

=3

了

liǎo

to finish (used with 得 dé or 不 bù after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget") (literary) (usually followed by a negative such as 无 wú or 不 bù) completely (not); entirely (not); (not) in the least to understand clearly (variant of 了 liǎo)

=3

了

liǎo

(of eyes) bright clear-sighted to understand clearly

=3

了

liào

unofficial variant of 瞭 liào

4

什麼事

shénmeshì

What's up?; Is something the matter? (coll.) (used in rhetorical questions of the form 关 guān + {person} + 什么事 shénmeshì "what business is it of {person}'s?; what's it to {person}?")