How to say "i'm so tall in french"?

Question

i was wondering mostly do you use si whenever youre saying so no matter what the sentence.

or are there other words you can use to depending on the context of the sentence

and how to say WHY ARE YOU SO TALL?

Answer 1

Well.."I'm so tall" could be

"Je suis si grand!"

or

"Je suis tellement grand!"

and "why are you so tall?" is:

"Pourquoi est-tu si grand?"

You don't always have to use "si"

I most cases, it just makes the sentence sound a bit better.

But there are other words you can use....like in the above example, "tellement" would be perfectly fine."

Answer 2

WHY ARE YOU SO TALL? = pourquoi es-tu si grand

this house is so big!  = cette maison est vraiment grande! it's an exclamation so I think the "si" is possible but really not as good as vraiment in that instance.