`1.` We were made study hard for our exam by my teacher last month

S + was/ were + PP + (by O)

`2.` Mrs. Chi asked her son if they would spend their holiday in Italy next month

S + asked + (O) + if/ whether + S + V_lùi thì

Tương lai đơn (will) `→` Tương lai trong quá khứ (would)

`3.` If we waste energy, our sources of energy will soon end

S + V_inf/ V_s/ V_es, S + will + V_inf

`4.` I haven't played the guitar for nearly ten months

S + has/ have + (not) + V_ed/ V3 + for + khoảng thời gian

`5.` Mr. Tam works the most carefully 

S + V + the + adj-avd/ most adv

`6.` Although that exercise was difficult, my brother could do it quickly

Although + S + V, S + V (Hai mệnh đề đối lập nhau)

1. We were made study hard for our exam last month.

-> Bị động thì QKĐ : S + was/were + V3/ed + (by O)

2. Mrs Chi said to her son if they would spend our holiday in Italy the following month 

-> Công thức câu tường thuật : S + say(s)/ said (that) + Mệnh đề được tường thuật

3. If we waste energy, our sources of energy will soon end.

-> If loại 1: If + S + V(s/es), S + will/can/shall + V(nguyên mẫu)

4. I haven't played the guitar for nearly ten months

-> S + have/has + not + V3/ed + for time

= It's + time + since + S + last + V2/ed

5. Mr. Tam works is the most carefully

Công thức so sánh nhất:

Nếu từ chỉ có 1 âm tiết: the + ADJ/ADV + -est

Nếu từ có 2 âm tiết trở lên: the + most + ADJ/ADV

6. Although that exercise was difficult, my brother could do it quickly

-> Although (mặc dù) + S + V, S + V...