We all think it interesting to play outside.We all think it's interesting to play outside.1,think it + adj.+to；it是形式宾语,adj.做了宾补,to do sth.是真正的宾语2,think it is + adj.+to；it is +adj to d...但是I think后面接从句， it interesting to play outside不是缺谓语么？没有缺啊，不是有 is 吗 ，it is我说第一句...it是形式宾语，adj.做了宾补，to do sth.是真正的宾语， 谓语就是前面的think， 不要讲后面的部分理解成从句。不是从句就不需要谓语啦