"在电话中当某人问你是谁时 ， 你要回答我是…… " 用英语怎么说

this is .....speaking

who' that/it? 你是谁？ it‘s/this is （your name). 如果是将你的问题翻译成英语，则是： when you're asked who you are, your have to/ are to answer with 'i am/it is/this is....'.

this is （你的名字） speaking

what is you name？my name is...或者l am_...

Who is this speaking? --- That is Tom speaking.