到2011年的时候，上海已经举办好了世博会。（用将来完成时态）怎么说？

问题描述：

到2011年的时候，上海已经举办好了世博会。（用将来完成时态）
怎么说？

问题解答：

Shanghai will have held the World Expo by 2011.

2011, when it has been held in Shanghai World Expo.

Shanghai has already hold off expo till 2011.

By2011,Shanghai will have held the World Expo successfully.

构成：主语+ shall/will have been doing
将来完成进行时表示动作从某一时间开始一直延续到将来某一时间。是否继续F去，要视上下文而定。这个时态常和表示将来某一旬的状语连用。如:
I shall have been working here in this factory for twenty years by the end of the year. 到今年年底，我将在这个工厂工作20年了
If we don't hurry up the store will have been closing before we get there. 咱们如不快一点儿，等我们到了那儿，店门就会关了。
The play is coming off in August. By then the play will have been running for three months. 这个剧将于8月停演。到那时为止，这个剧将连演三个月了。