Jack (did) not attend the meeting yesterday.括号里为什么要用did?
问题描述：
Jack (did) not attend the meeting yesterday.括号里为什么要用did?
答
Jack (did) not attend the meeting yesterday.括号里为什么要用did?这句话什么意思?
句意是：“昨天Jack没去参加会议”.
did是助动词,帮助动词attend构成过去时的否定形式.