I attend a meeting.

我出席一个会议。

youdao

That I have been able to attend a grand meeting such as this one, fills my mind with a myriad of thoughts and ideas.

我能参加这样的盛会，真是百感交集，思绪万千。

《新英汉大辞典》

I have to attend a meeting.

我得开会去。

youdao

"As a result I missed out on the chance to attend a council meeting yesterday to contribute to a discussion on the budget... a meeting that wasn't attended by Allan Pennington, " he said.

BBC: Prestatyn vote mix-up: Allan Pennington challenges court