It is just that I find science really difficult 什么句型呢?不清楚!是表语从句还是强调句型!

It is just that I find science really difficult 什么句型呢?不清楚!是表语从句还是强调句型!
It is just that I find science really difficult 什么句型呢?不清楚!
是表语从句还是强调句型!

It is just that I find science really difficult 什么句型呢?不清楚!是表语从句还是强调句型!
这是主系表结构
It + be + that --表语从句
请及时采纳,不懂继续问( 天天在线 ）

是强调句型
It is that
有不明白的地方再问哟，祝你学习进步，更上一层楼！ (*^__^*)

请问楼上的这个强调句强调的是神马？