... Affirmative: S + am / is / are + ………… Ex: I am a student.b) Negative:S + am / is / are + not + …………Ex: My mother is not a teacher.( isn’t )c) Interrogative:Am / Is / Are + S + ……………….?Ex: ... tại tiếp diễn):a) Affirmative: .S + is/am/are + V-ing + Ex: I am teaching English. She is playing computer games.b) Negative: .S + is/am/are + not + V-ing + Ex: I am not teaching English. ... to, from.5. Some other structures: (Một số cấu trúc khác): Let’s + V(n.mẫu) Why don’t we + V (n.mẫu) + ?What about + V-ing + ?6. Adverbs of frequency : always, usually, often, sometimes, never...