` 1. ` When did Charline and Helen start working for NASA?

` - ` Wh_q + did + S + V - inf?

` - ` Start + V - ing: Bắt đầu làm gì

` @ ` How long thường dùng trong thì HTHTTD, when thường dùng trong thì QKD

` 2. ` The West Indian Island of Santo Domingo was attacked in 1801

` - ` Bị động QKD: S + was / were + V3 / ed + ( by O )

` 3. ` The homework assignments have to be finished

` - ` Bị động với have / has to: S + have / has + to + be + V3 / ed + ( by O )

` 4. ` A pay rise is being considered 

` - ` Bị động HTTD: S + am / is / are + V3 / ed + ( by O )

` 5. ` You are better at Math than me

` - ` SS hơn với adj ngắn: S1 + tobe + adj - er + than + S2

` - ` SS bằng: S1 + tobe + as + adj / adv + as + S2

` 6. ` It is too late for us to start a new lesson

` - ` S + tobe + so + adj + that + S + V = S + tobe + too + adj + ( for sb ) + to V: Quá ... đến nỗi mà ...