Step 1: Look at the following sentence, paying attention to the underlined part.
Over time I have been changed a lot.
Step 2: 现在完成时的被动语态的谓语构成形式：
The results of their experiments have already been published.
The party has been planned since the new year.
肯定式：have / has（has只用于第三人称单数，其余人称用have） + been + 及物动词的过去分词。
They haven’t been told about it yet.
否定式：_____________________+及物动词的过去分词。
—Have his books been sold out?
—Yes. So you can’t buy one now.
一般疑问句形式：
______________________+及物动词的过去分词。
How many experiments have been done by the students this month?
特殊疑问句形式：
疑问词+have / has +been+及物动词的过去分词。
