查閱了曹老師對電話用語的回答：

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


This is Tom that is speaking.

請問老師， 強調句型不都是It引導的么 這里為何用的是This？

分裂句的主句的主語可以是指示代詞。Huddleston《劍橋語法》對此所舉的例句如下：

Those are my biscuits youre eating.

This is a serious problem we have here.

This is Jill speaking.