Ex 4:
$\text{1.}$ Did - hear
$\text{→}$ last chia QKD
$\text{2.}$ has been
$\text{→}$ since chia HTHT
$\text{3.}$ forget
$\text{4.}$ Did - go
$\text{5.}$ go
$\text{6.}$ live
$\text{7.}$ has been
$\text{→}$ for chia HTHT
$\text{8.}$ want
$\text{→}$ always chia HTD
$\text{9.}$ Did - pass
$\text{10.}$ failed
$\text{→}$ vế sau chia QK nên về đầu chia QK
$\text{11.}$ started
$\text{12.}$ Has - got
$\text{→}$ since chia HTHT
$\text{13.}$ have - improved
$\text{→}$ since chia HTHT
$\text{14.}$ is
$\text{15.}$ have been
$\text{→}$ for chia HTHT
Ex 5:
$\text{1.}$ If the wind wasn't blowing hard, I wouldn't take the boat out for a ride.
$\text{→}$ Câu đk loại 2 trái với HT.
$\text{2.}$ If Paulo wasn't working on 2 jobs right now, he would have time to help you with your problems.
$\text{→}$ Câu đk loại 2 trái với HT
$\text{3.}$ If I was fluent in English, I could study abroad.
$\text{→}$ Câu đk loại 2 trái với HT
$\text{4.}$ I wish the sun was shining.
$\text{→}$ Câu cầu ước ở HT: S + wish<es> + QKD
$\text{5.}$ I wish my husband hadn't invited the neighbors over for dinner because I didn't feel like cooking a big dinner.
$\text{→}$ Câu cầu ước ở HT, QK: S + wish<es> + QKHT
$\text{6.}$ We wish we had enough money to buy what we wanted.
$\text{→}$ Câu cầu ước ở HT
$\text{7.}$ He wishes he found another job after he had quit my job.
$\text{→}$ Câu cầu ước ở HT, QK
$\text{8.}$ I wish it wasn't winter so I could go skiing.