أرسل هذا في رسالة قصيرة: An investigation into some common errors in using auxiliary verbs made by first - year students at the Faculty of Information Technology - Thai Nguyen University

 _____       ___     _    _    __   __    _____   
|  __ \\    / _ \\  | |  | ||  \ \\/ //  /  ___|| 
| |  \ ||  / //\ \\ | |/\| ||   \ ` //  | // __   
| |__/ || |  ___  |||  /\  ||    | ||   | \\_\ || 
|_____//  |_||  |_|||_// \_||    |_||    \____//  
 -----`   `-`   `-` `-`   `-`    `-`'     `---`