That could be a good way to help.为什么不用It,那不是形式主语吗

It,s good to live in a neighbourhood like that.it是形式主语吗? English can be a good tool to help me.It is a way to an end It,s good to live in a neighbourhood like that.it是形式主语吗?这句话的 it is a good way to help us have___with english it was a good way to learn things that couldn't be easily fo That's a good way to look at it That 放句首的主语从句,那不是变得头重脚轻了吗?能不能改成It be 强调部分 that +主语从句?请举例 Singing English songs is a good way to learn English用it作形势主语 That's good to hear.为什么不是that's good to be hear It's a good time to climb hills中的It是不是形式主语 To find your way can be a problem中的to find为什么是主语啊? it is very kind of you to help me ,it是形式主语吗?