我觉得后者可以,前者固定搭配错误,应为To ensure him to attend the meeting,
固定短语：ensure sb to do ensure sb's doing
英语翻译
___________________(为了确保他参加会议),I called him up in advance.
这里为什么不能写成 ：To ensure him attend the meeting或是To ensure his attending the meeting?
我觉得后者可以,前者固定搭配错误,应为To ensure him to attend the meeting,
固定短语：ensure sb to do ensure sb's doing