Can farmers be prevented from cutting down trees?
语法么,你就想一般的疑问句也就是助动词提前嘛,比如do you remember,can you help me之类的,被动也一样~
总之这么读很通顺啦,相信语感~那么再例如：you were invited by lucy.对lucy划线提问改疑问句是:who were invited by ?这里的话提前的就是被动语态中的这个be. 是么嗯，Who were you invited by?：我想知道谁邀请了你 翻译出来是 i want to know who you were invited ？句末需要加 by 么？需要的，因为这个从句里的成分还是主语you+动词were invited+介词by+宾语who/lucy，只是换了顺序而已。