I am sometimes confused about the past participle "been".
It is used for duration and for other purpose which I don't know. So, my question is about the uses of "been". I can't judge whether the "been" past participle is used for duration or it has other meaning.
I am going to give some examples which are given below. Please add some of your own examples with the "been" participle and with explanation.
- I didn't tell Sam what happened. He wouldn't have been pleased.
- I have been teacher for a year.
- I have been teacher.
- Has ever been a war in United States?