【正确表达】

There is going to have a lecture in the hall tomorrow morning.

明天上午有一个演讲在大厅举行。

【讲解辨析】

用there be句型表示在某地有举办什么活动，它有各种时态的变化。就这个句子，它表示的是将来的事情，那么一般将来时态用there is going to be句型，不用there is going to do句型。

【正确表达】

There is going to be a lecture in the hall tomorrow morning.

【举一反三】

There is going to be a football match on the play ground the day after tomorrow.

后天在操场上将举办一场足球比赛。