have they discussed the question?变被动语态?被动语态疑问句提前的一定是be么

have they discussed the question?变被动语态?被动语态疑问句提前的一定是be么
have they discussed the question?变被动语态?
被动语态疑问句提前的一定是be么

have they discussed the question?变被动语态?被动语态疑问句提前的一定是be么
Have the question been discussed by them?

Have the question been discussed?
教你一个方法，先把该句还原成陈述句，再变被动，再变疑问句。
They have discussed the quesiton.
The question have been discussed.
被动语态的疑问句提前一定是be，要看情况

Have the question been discussed （by them）？不是绝对，如果句子中涉及到时态的时候，那就不是be提前了