it's been ten years 为什么不加for

it's been ten years 为什么不加for The man has been dead for ten years(同义句） It”s ten years__the It's been five or ten years from happenning for about 50 yea The Smiths (have been living) here for ten years 为什么不能用 have He has been died for ten years 他们结婚十年了 They have been married for ten years 为什么要用have been Mr.Green has been dead for ten years为什么要用has been daed The Smiths have been here for over ten years 为什么用“been here” 1.It's been around for hundreds of years. It's+been+in+Boston+for+over+250+years. I have been a taxi for n( )ten years.It is a nice j( )most o He's been playing golf for ten years..He 后面是 has