问题描述：
has been doing的问题,
It has been a long time coming,but tonight,because of what we did on this date in this election at this defining moment,change has come to America .开头it's been a long time coming 什么情况?has been doing吗?但是正确的是has been doing sth,开头句子好像不是啊?
那第一句是什么句型？
It has been a long time coming,but tonight,because of what we did on this date in this election at this defining moment,change has come to America .开头it's been a long time coming 什么情况?has been doing吗?但是正确的是has been doing sth,开头句子好像不是啊?
那第一句是什么句型？
问题解答：
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