she is always there to listen中,is为什么不能去掉,求分析

Because she is always there to listen She is always there.I'm just a passing She is always there to listen.为什么有 is 如果是语法点 详述 she is always there to listen中,is为什么不能去掉,求分析 Jane‘s house is c_____to her school,so she always walks there She always works hard at it,though there is much troubleShe always works hard at it,but there is much trouble He is always there to There is always someone是什么意思 there is always a way She never _____angry,she is always happy. Is she up there! She is always和She always有什么区别? she is always study.还是she always study hard? --Where is Lucy?--Look,（there is she /there she is) she is thin but she is always on a diet She is always friendly and helpful. She is always friendly and helpful. She is always ready ____(help) others.