For more than a decade 是什么用法呢

来源：百度知道编辑：UC知道时间：2024/06/12 03:53:40

For more than a decade I've written about the potential health effects of eletromagnetic field from cell phones and other devices?句中 for more than a decade?充当什么成分呢？这是什么用法呢？

现在完成时，for more than a decade 实际就是很长时间的意思了，很长时间以来，我一直在写一些手机和其他设备电磁领域的关于健康的文献。

decade 等于 ten years 这个短语在句子里作时间状语，所以主句里用的是现在完成时。

本句为现在完成时，for more than a decade 是时间状语，其中 decade 等于 ten years

时间状语啊，表时间段

I ___a college student for more than a year. 时间状语more than a week前加不加 for It have opened for no more than a week I___ in a brick factory for more than 50 years.Now I'm a farmer. My parents __ for more than fifteen years.A,have got married B,have been married the man drank a little more than was good for him After playing football for more than half an hour,the students took a __ rest He was ill for more than a month.(对划线部分提问) He sat in a small bar,drinking and smoking consederably more than is good for health More than a month 是什么意思啊???