这句话错了,错在哪?The Olympic Games in BEIJING in this summer vacation(这个暑假奥运会在北京举行）

The Olympic Games are held in Beijing during this summer vacation.

The Beijing Olympics was held during Summer Vacation

这不是一句话，只是短语而已。
This Olympic Games is held in Beijing in the summer vacation.

The olympic games will be held in beijing in this summer vacation 没有加助动词.

The Olympic Games was held in Beijing during this summer vacation.过去时
The Olympic Games will be held in beijing in this summer vacation.将来时
主(定)谓(状)宾(补) 是句子基本结构 和语文是一样的
再看时态 地点在前时间在后就对了^_^

这不是一个完整的句子，没有谓语，只有名词和它的限定词。
如果要表达成一个完成的句子，那么应该是The Olympic Games is in BEIJING in this summer vacation.
加上一个is就可以了。

没动词！
The Olympic Games had been held in BEIJING in this summer vacation!