Question

英语， To do today's homework without the teacher's help is very difficult.找出句中主语中心词。

Answer 1

主语是to do today's homework，谓语is， without the teacher's help是定语，解释主语的

追问

What I want to tell you is this.
The days get longer and longer when summer comes.
He is interested in music.
这几个能帮忙分析下吗？
还有能不能指出哪些有系表结构

追答

1. 主语是what, 谓语is, i want to tell you是定语

2. 主语是the days, 谓语get, when summer comes是定语

3. 主语是he, 谓语is, 无定语
   

追问

系表结构呢