發送短信 : A contrastive study on grammatical subject as a clause element in English and in Vietnamese from perspective of systemic-functional grammar

 ______     _____     _____     ______   _    _   
|      \\  |  ___||  |__  //   /_   _// | \  / || 
|  --  //  | ||__      / //     -| ||-  |  \/  || 
|  --  \\  | ||__     / //__    _| ||_  | .  . || 
|______//  |_____||  /_____||  /_____// |_|\/|_|| 
`------`   `-----`   `-----`   `-----`  `-`  `-`