句型It‘s+adj+for sb to do sth...但句子They might find it difficult to plan things for themselves

句型It‘s+adj+for sb to do sth...中 It 是形式主语,is 是系动词,to do sth动词不定式短语做真正的主语.They might find it difficult to plan things for themselves. They 作主语might find作谓语 it作形式宾语 d...