http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Động từ - Ngữ động từ = English grammar exercises: Verb and verb phrasal
Giới thiệu một số bài tập ngữ pháp tiếng Anh về cấu tạo động từ, ngoại động từ và nội động từ, động từ "to be" và trợ động từ, động từ tình thái, các dạng thức của động từ và ngữ động từ