it difficult to do sth 和it is difficult to do sth 的区别
问题描述：
it difficult to do sth 和it is difficult to do sth 的区别
答
it difficult to do sth不完整吧，这个结构只有主语成分，不能成句子，其中difficult to do sth是省略的定语从句，修饰it的
答
it difficult to do sth:difficult修饰to do sth.例如：I feel it difficult to speak English.其中it指代speak English,difficult修饰speak English.It is difficult to do sth:常见句型,意思是:做什么事...难....