$@Mốc$

Chú ý: + Cấu trúc if:

ĐKL1: If + S + V(htđ) , S + will/can/could/may/might/..... + V(nguyên thể)

            + Unless = If not.

$21.$ If he tries hard, he'll pass the examination.

$22.$ I could understand the French teacher if she speaks more slowly.

$23.$ If I finish the work in time, I will go to the football game.

$24.$ If you see Mary today, please ask her to call me.

$II$/ 

$1,$ If we don't start at once, we will be late

⇒ Unless we start at once, we will be late.

$2,$ If you don't study hard, you won't pass the exam.

⇒ Unless you study hard, you won't pass the exam.

$3,$ We will go for a picnic by the river tomorrow if it doesn't rain.

⇒ We will go for a picnic by the river tomorrow unless it rains.

$4,$ They won't come if you don't invite them.

⇒ They won't come unless you invite them.

$5,$ If I don't hear from you, I'll see you at two o'clock.

⇒ Unless I hear from you, I'll see you at two o'clock.

$7,$ We could eat at Siam Smile if they're not closed on a Monday.

⇒ We could eat at Siam Smile unless they're closed on a Monday.

$8,$ I'll make dinner if nobody else wants to.

⇒ Unless nobody else wants to, I won't make dinner.

$#chucbanhoctotnhe;333$

$\text{21.}$ tries

$\text{→}$ Câu đk loại 1: If + HTD, TLD

$\text{22.}$ spoke

$\text{→}$ Câu đk loại 2: If + QKD, S + could/ would/ might + V.

$\text{23.}$ finished - would go

$\text{→}$ Câu đk loại 2 trái với HT

$\text{24.}$ see - ask

$\text{→}$ Câu mệnh lệnh ko có S thường dùng câu đk loại 1

II.

$\text{1.}$ Unless we start at once, we will be late.

$\text{2.}$ Unless you study hard, you won't pass the exams.

$\text{3.}$ Unless it rains, we will go for a picnic by the river tomorrow.

$\text{4.}$ Unless you invite them, they won't come.

$\text{5.}$ Unless I hear from you, I will see you at 2 o'clock.

$\text{7.}$ Unless they are closed on a Monday, we could eat at Siam Smile.

$\text{8.}$ Unless someone else wants to, I will make dinner.

$\text{→}$ nobody = not

$\text{→}$ Unless = If not