$\text{1.}$ drive $\text{→}$ driving
CT: prevent sb from doing sth
$\text{2.}$ shan't $\text{→}$ shall
CT: Let's + V, shall + S?
$\text{3.}$ eexperienced $\text{→}$ more experienced
CT: experienced là tính từ dài, khi so sánh hơn phải thêm more
$\text{4.}$ quick $\text{→}$ quickly
CT: sau V <spoke> là adv <quick-ly>
$\text{5.}$ buy $\text{→}$ to buy
CT: It's possible to-V
$\text{1.}$ is $\text{→}$ were
CT: Câu điều kiện loại 2: If + S + V<qkd>/ were, S + would/ could/ might + V
$\text{2.}$ do $\text{→}$ did
CT: It's time sb + Ved/ P1
$\text{3.}$ working $\text{→}$ worked
CT: 16 hours a day ở câu trực tiếp chia HTD, câu gián tiếp chia QKD
$\text{4.}$ three-days $\text{→}$ three-day
CT: three-day là 1 cụm nên day ko thêm -s
$\text{5.}$ at $\text{→}$ on
CT: keep an eye on sb: để mắt đến ai
$\text{6.}$ getting $\text{→}$ to get
CT: in order to V: để làm gì
$\text{7.}$ writing $\text{→}$ is written
CT: câu bị động HTD: S + be + Ved/ P2 + (by)
$\text{8.}$ sending $\text{→}$ sent
CT: như câu 7
$\text{9.}$ which $\text{→}$ that
$\text{10.}$ prevent $\text{→}$ be prevented
CT: câu bị động với modal V: Modal V + be + Ved/ P2
$\text{11.}$ from $\text{→}$ since
CT: HTHT + since + QKD
$\text{12.}$ since $\text{→}$ for
CT: for + khoảng thời gian; since + thời gian xác định
$\text{13.}$ hardly $\text{→}$ hard
CT: adv của hard: chăm chỉ là hard; hardly: khó khăn
$\text{14.}$ frightened $\text{→}$ frightening
CT: adj chỉ sự vật có đuôi -ing
$\text{15.}$ live $\text{→}$ living
$\text{16.}$ taller $\text{→}$ tall
$\text{17.}$ said $\text{→}$ saying
CT: After + S + V/ V-ing
$\text{18.}$ rung $\text{→}$ rang
CT: ring - rang - rung
$\text{19.}$
$\text{20.}$ done $\text{→}$ do
CT: adj enough/ enough N (for sb) to do sth
$\text{21.}$ are $\text{→}$ were
CT: 800 years ago ⇒ dùng QKD