$1.$ I don't regret choosing nursing as a career.
- (not) regret + V-ing: hối hận/ không hối hận khi làm gì.
$2.$ I regret buying that second-hand car.
$3.$ Angela regrets not watching that film.
$4.$ Do you regret that you didn't go to university?
$5.$ I regret I didn't go to university.
$6.$ The kidnappers threatened to kill the boy if they didn't pay the ransom.
- threatened + to V: đe dọa ai nếu họ không làm gì.
$7.$ She threatened to call the police if he didn't leave immediately.
- threatened + to V: đe dọa ai nếu họ không làm gì.
$8.$ She didn't mean to insult you.
- S + didn't + V (bare).
