関連ワード:  when to use has been in a sentence    when to use have been in a sentence    when to use had been in a sentence    when we use has been in a sentence    when to use would have been in a sentence    when to use could have been in a sentence    when to use will have been in a sentence    when to use has been and had been in a sentence    when to use have been and has been in a sentence    when we use have been in a sentence