She seems to have forgotten the appointment that we made last week.
right
She regretted not having studied harder for the test.
right
He claims to have seen a UFO in the sky last night.
right
The athlete was thrilled to have broken the world record in the event.
right
I don't remember to see John at the party.
wrong: I don't remember seeing / having seen John at the party.
Watering them at night, the plants will live longer.
wrong: Watered at night, ... Watering plants at night, we'll help them live longer.
After three years, I have finally got used to live in this city.
wrong: I have finally got used to living in this city
In these cases, doctors often recommend to take sleeping tablets.
wrong: doctors often recommend taking sleeping tablets.
After all the confusion, the students were made to retake the exam.
right
Do you know what number call in case of emergency?
wrong: do you know what number to call?
It is no use to take antibiotics if you have a virus.
Wrong: It's no use taking antibiotics
I expect to finish cooking before the guests arrive.
wrong: I expect to have finished cooking before the guests arrive.
Finishing their meal, the diners congratulated the chef on her wonderful paella.
Wrong: Having finished their meal, the diners congratulated the chef.
It's no good to complain to the receptionist. There is nothing she can do about the problem.
Wrong: It's no good complaining to the receptionist.
I would rather to have stayed at home, but my friends ended up convincing me to go our for dinner.
Wrong: I would rather have stayed at home.
It is not unusual to be made redundant when your company is doing badly.
Right
