Does any of you know why Jack hasn't come yet 这句话中为什么用does

Does any of you know why Jack hasn't come yet 这句话中为什么用does i don't know why he hasn't come yet. .I don't know why .A) he come here B) does he come C) he cam Does Jack come from Japan?Do you know?(合并成一个句子) Do you know_ Why does the bear not to eat Jack?这句话用英语怎么回答 It hasn't been decided yet whether/if he will come soon这句话的时 "Does she have any brother and sisters?" 这句话有动词吗?为什么用"does"? Why hasn't jim come yet?If he doesn't arrive in five minutes Why does he don't like math?这句话正确吗?翻译：他为什么不喜欢数学? Li Lei hasn't come yet.I don't know what___to him.A.happen B Lucy hasn't come yet.I don't know what______(happen) to her. Do you know the reason why/for which he didn't come?这句话的意思?