twenty years是单数还是复数?

twenty years是可数名词的复数形式，因为是years，详解如下。 名词根据其可数性可分为可数名词（Countable Noun）和不可数名词（Uncountable Noun）。可数名词即指可以分为个体，且可直接用数目进行计数的名词，如课桌、风筝、女孩、房间、学校等。可数名词有单数和复数两种形式。指一个人或一件事物时，用单数形式；指两个或多个人或事物时用复数形式。

inthepast20years用什么时态?

in the past 20 years意思是“在过去的二十年中”，要用现在完成时态，例如： There have been many changes in the past twenty years. 现在完成时态表示过去的动作或状态持续到现在，不能和表示一般过去的时间状语连用。一般和already，yet，in the past/last few years等副词连用，或者用于since和for引导的句子中，但是动词必须要用延续性动词。

20 years的缩写?

20 years twenty years 这巳经是缩写了。如， In the past 20 years,China has kept developing forward rapidly. 在过去的20年中,中国一直高速向前发展。 The past 20 years have been a journey of productive cooperation. 二十载命运与共,新时代再攀高峰。 Twenty-four years old 24岁 可以缩写为：24 years old。

in20years作文60词?

My life in twenty years will be fantastic and wonderful.I will have a job that I like.I will be married and have children.I will get my favourite cars and drive my family around in the city.I will get the most beatiuful in town for my family.They are the things that will happen to me after 20 years

in the past 20 years什么时态?