... languages lack the variations in form that make agreement necessary Actually, subject- verb agreement in English is a must, as stated by Hannah (2012), to communicate clearly in the English language, ... necessary for the learners to match a singular subject with a singular verb and a plural subject with a plural verb, as well as to determine what verb to use with a singular or plural subject, ... examples: Mai c a hàng Mai -singular subject Mai goes to the boutique (subject) ( verb) (expansion) Mai Tuan c a hàng Mai and Tuan -plural subjects Mai and Tuan go to the boutique (subject) (verb) ...