分类：教育/科学-外语学习-英语考试
问题：IthinkitisveryimportanttolearnEn? 
同义句转换I think ____ ____to learn  well.
回答：I think (it important) to learn English well.
即可！~

I think it is very important to learn English well. 
这句话是i think引导的宾语从句。后面的it is very important to learn English well整个句子作为think的宾语。

I think (it important) to learn English well.
这里的it和to learn English well是同位的关系，it在这里代替to learn English well。
可以理解为it是形式宾语，而to learn English well是真正的宾语，important是宾语补足语。