How do you study English?

I write or do essay in n English.

=> Corrected : The sentence is corrected grammatically. 

​(Capitalization)

​(Punctuation) 

B. What do you want of skirt?

=> Corrected : The sentence is corrected grammatically. 

Which skirt do you want? 

I want to wear red skirt.

=> Another way: Your sentence is okay and this is another way of saying it.

I want the red one, please. 

Can I wear this?

=> Another way: Your sentence is okay and this is another way of saying it.

​

Can I try it on?​