That would be a good way to keep both teachers and students
That would be a good way to keep both teachers and students happy It is also probably a good idea for parents to allow teenagers to study in groups 是什么结构
That(主语) would be(系动词) a good way(表语) to keep both teachers and students happy(后置定语). It(形式主语) is(系动词) also probably a good idea(表语) for parents(状语) to allow teenagers to study in groups(不定式作逻辑主语)