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

是否

shìfǒu

whether (or not) if is or isn't

4

愛

ài

to love; to be fond of; to like affection to be inclined (to do sth); to tend to (happen)

5

我

wǒ

I me my