We have been waiting a long time.不用for a long time

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：英语作业时间：2024/05/09 00:16:53

这里的for可以省略.
祝你进步
再问：是否类似于walk 20 kilometres一样可以作为及物动词，其后直接加表示时间的名词？
再答：不及物动词+for+时间 / 距离这种结构，通常都可以省略for。但这里的walk依然是不及物动词。
再问：字典中wait vt&vi，那wait做及物动词是什么情况呢？能举例说明吗？谢谢！
再答：个别情况下做及物动词。如wait my turn 等候。。。，wait a chance等待机会

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