Traditional Culture Encyclopedia - Weather forecast - An English question!

An English question!

Hello, I'm Tim. () That?

Fill in what?

Hello, I'm Tim. Who's this?

I usually use this is ... to express "I am." . "instead of me ... in the same way, who are you is said to be who?"

What terrible weather!

Is this sentence correct? Ball commentary!

This is an exclamatory sentence, which translates as: what a terrible weather! But because the weather is uncountable, it can't be decorated with a. Similarly, what a beautiful girl! What a beautiful girl! A is added here because girl is a countable noun