have been/have been in/have been to/have gone to

首先在语义上，provide仅表示“提供”，而offer强调“主动提供”。

其次在语法和搭配上，offer后可跟双宾语，而provide后不可跟双宾语

最后在搭配上，offer可组成词组offer sb. sth./offer sth. to sb.；provide可组成短语provide sb. with sth./provide sth. for sb.

have been意为“成为……多长时间”；have been in意为“在某地呆了多长时间”。二者都常与表示一段时间的状语连用。如： 

 1、She has been a teacher for five years。 

2、I have been here for two hours。 

3、His parents have been in China for three months。 

have been to意为“曾经去过某地”，现在已不在那里了，常与ever,just,never等词连用。其后可接once,twice等表示次数的词。如： 

4、He has just been to the library。 

5、They have never been to the Great Wall。 

6、I have been to Beijing many times。 

have gone to意为“到某地去了”，说话时作句子主语的人不在现场，通常是第三人称作句子的主语。如： 

7、Whereis Tom? He has gone to the post office。 

8、Mr Green isnt here。He has gone to Shanghai。