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

             ___     __   _      ___              
  ____      / _ \\  | || | ||   / _ \\      ___   
 |    \\   | / \ || | '--' ||  | / \ ||    /   || 
 | [] ||   | \_/ || | .--. ||  | \_/ ||   | [] || 
 |  __//    \___//  |_|| |_||   \___//     \__ || 
 |_|`-`     `---`   `-`  `-`    `---`       -|_|| 
 `-`                                         `-`