查阅了曹老师对电话用语的回答：

http://ask.yygrammar.com/q-33356.html


This is Tom that is speaking.

请问老师， 强调句型不都是It引导的么 这里为何用的是This？

分裂句的主句的主语可以是指示代词。Huddleston《剑桥语法》对此所举的例句如下：

Those are my biscuits youre eating.

This is a serious problem we have here.

This is Jill speaking.