1

我不知道

wǒbùzhīdào

I don't know.

2

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)

3

什么时候

shénmeshíhou

when?; at what time?

=4

从

cóng

variant of 從 cóng

=4

从

Cóng

surname Cong

=4

从

cóng

from; through; via (bound form) to follow (bound form) to obey (bound form) to engage in (an activity) (used before a negative) ever (bound form) (Taiwan pr. zòng) retainer; attendant (bound form) (Taiwan pr. zòng) assistant; auxiliary; subordinate (bound form) (Taiwan pr. zòng) related by common paternal grandfather or earlier ancestor

5

法国

Fǎguó

France

=6

回来

huílai

to return; to come back

=6

回来

huílái

(to come or bring) back (used after a verb to indicate direction towards the speaker) back (used after a verb to indicate direction towards the speaker) to return; to come back; to be back