... be”) (+) : S + V II,ed + (+) S + was / were + … (-) : S + didn’t + V-inf… ( -) S + Was / were + not + (?) : Did + S + V-inf….? => Yes, S + did / No , S + didn’t (?) Was / Were + S + ... đơn) (+) S+ V II,ed…(-) S + didn’t + V-inf…(?) Did + S + V-inf…?Last, ago, in the past, when, yesterday.2. Simple present tense ( Hiện tại đơn) (+) S+ V / Vs / Ves …(-) S + don’t/ doesn’t + ... V-inf…(?) Do/ Does + S + V-inf…?Always, often, sometimes, never, usually, every…3. Simple future tense( tương lai đơn) (+) S+ will+ V-inf…(-) S + Won’t+ V-inf…(?) Will + S+ V-inf …?Tomorrow,...