为什么一个有一个没有

来源:百度知道 编辑:UC知道 时间:2024/05/28 19:31:05
1.We don't think it is difficult to learn English Grammar.

2.She thought it a great honour to be invited to speak to us.

为什么一个有IS,一个没有呢.
这两句话有什么区别.

第一句话有is,因为it is difficult to learn English Grammar是一个完整的句子作think 的宾语从句.而第二个句子是这样的:thought是主句的谓语,it 是形式宾语,a great honour 是名词词组作宾补,to be invited to speak to us是动词不定式作真正的宾语.