41 If you work hard and you will pass your exam.

42 My brother does not play tennis well

- Hiện tại đơn (-) S + doesn't/don't + V

- V + adv 

43 Since I’ll be on vacation next week, I won’t be able to attend the meeting.

- Since/As/Because + Clause(nguyên nhân), Clause(kết quả) : Bởi vì

= Clause(nguyên nhân), + so + Clause(kết quả) : ....vì vậy....

44 Unless you start working hard now, you won’t be able to pass the final test.

- Câu điều kiện loại 1 - Có thể xảy ra ở hiện tại hoặc tương lai

(+) If + S + V(HTĐ), S +will/can + V

(-) If + S + don't/doesn't +V, S + won't/will not + V

= Unless + S + V(HTĐ), S + won't/will not + V

45 This garbage should be taken to the garbage dump soon.

- Bị động - V khuyết thiếu

+ S + should be + PII (by......)

41. Work hard and you will pass your exam.

`->` If you work hard, you will pass the exam 

`=>` Câu điều kiện loại `1`

42. My brother is not good at playing tennis.

`->` My brother doesn't play tennis well.

43. I’ll be on vacation next week, so I won’t be able to attend the meeting.

`->`  Since I’ll be on vacation next week, I won’t be able to attend the meeting.

44. If you don’t start working hard now, you won’t be able to pass the final test.

`->` Unless start working hard now , you won't be able to pass the final test.

`=>` Cấu trúc:  Unless + S + V (simple present), S + will/can/shall + V

45. Someone should take this garbage to the garbage dump soon.

`->` This garbage should be taken to the garbage dump soon