请分析两句话的语法?I have been there twice.I have learned English for

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请分析两句话的语法?
I have been there twice.
I have learned English for three years.
第一句的twice是什么用法?
为什么第二句用吧FOR?
I have done that for three times这句话对吗?

twice 两次
第一句话的意思是我到过那里两次
第二句话three years 三年是个延续的时间.这句话意思是我学英语已经有三年了.表示持续学了三年,所以用for引导一个持续性的时间.
I have done that for three times.错了.three times意思是三次,刚才说了for后面要用延续性的,三次表示次数,短暂的时间,所以不能这么用,把for去掉就可以了,“我做了三次了”

请分析两句话的语法?I have been there twice.I have learned English for i have been there for twice 这句话有错吗 1.i have learned english.2.i have been learning english.这两句话 i have been there twice "I have been there for holidays twice"翻译英语翻译是什么语态啊I have been learned english for 5 years.这句话和I have I have learned english for five yeats与l have been learning e i have been learned English before. i had been learned Engli How long have you learned English?I have learned English () i have learned english for 3 years.这里哪里错 I have been there I have been there twice.(对划线部分提问)twice画线 ------ -------- ---