i have been there （for） four times.这句话中括号里的for要加吗?可不可以不加?

i have always been there i have never been there I have been there,have been 是have been in还是have been to的缩写? I have been there.(改为一般疑问句 Because I never have been there before. I have been there by train.I have ______get. i have been there twice为什么不是 been to? they have been there before.so have i they have been there before.(),() 改为同义句 i have been there 3 years ago 还是i have been there for 3 years ago I have been there twice.(对划线部分提问)twice画线 ------ -------- -------- have you been there. I have to i____ that i've been there have been there 中文翻译 have been there I have never been there.been是不及物动词?there是状语? 改错 I have been to there three times. I should have never been there应该怎么翻译 I have been there for holidays twice翻译 I have been there( )three times.括号里加for吗 I have never been there,改为反义疑问句?