45. A fantastic English Club was held in our school last weekend.

S + was/were + V3/ed: bị động  -QKĐ

46. Mr. Quang said that he had worked in that factory 3 years before.

S + said + (that) + S+ V (lùi thì)

QKĐ ⇒ QKHT

this ⇒ that 

ago ⇒ before

47. If you are careful, you won't break that valuable vase.

if 1: if + HTD, S + will/can/shall ... + V1 

48. We haven't played tennis since we were in London.

The last time +S + V2/ed+ was+ time 

= S + has/have + not + V3/ed + for/since +time 

49. My father drives more carelessly than my mother.

S + V+  more + long-ADV + than + O : ss hơn 

50. Although her foot was injured, she managed to walk to the village.

Although + clause, clause: mặc dù 

`color{orange}{~MiaMB~}`

45. A fantastic English club was held in our school last weekend.

→ BĐ thì QKĐ: S + was/were + V3/ed (+ by O)

46. Mr. Quang said he had worked in that factory 3 years before.

→ Câu gián tiếp dạng câu kể: S + said/told + (that) + S + V (lùi thì)

→ Lùi:

- QKĐ (S + V2/ed) ⇒ QKHT (S + had + V3/ed)

- this ⇒ that

- ago ⇒ before

47. If you are careful, you won't break that valuable case.

→ ĐK loại 1:If + S (số ít) + V (s/es), S + will + V

48. We haven't played tennis since we were in London.

→ Thì HTHT: S + has/have + not + V3/ed + since + S + V2/ed

→ since + mốc thời gian

49. My father drives carelessly than my mother does.

→ So sánh hơn với tính từ/ trạng từ dài: S1 + tobe/ V + more + adj/adv + than + S2

50. Although her foot was injured, she managed to walk to the village.

→ In spite of/ Despite + N/Ving, S + V ⇔ Although + S + V, S + V

⇒ mặc dù ... nhưng ...