Выполнитьнужно
use either an infinitive or a gerund.
a. 1. don't forget (e-mail) when you are away on holiday.
2. we will never forget (go) to america a year ago.
b. 1. he didn't mean (hurt) you at all!
2. it would mean (queue) for a long time.
c. 1. now i regret (buy) the cottage that is so far from the centre.
2. i regret (say) that you have failed the interview.

Выполнитьнужно
use either an infinitive or a gerund.
a. 1. don't forget to email when you are away on holiday.
2. we will never forget going to america a year ago.
b. 1. he didn't mean to hurt you at all!
2. it would mean queuing for a long time.
c. 1. now i regret buying the cottage that is so far from the centre.
2. i regret to say that you have failed the interview.

a.
1. Don't forget TO EMAIL when you are away on holiday. (infinitive)
Explanation: In this sentence, the phrase "to email" is used as the direct object of the verb "forget". The infinitive form is used to show the purpose or intention of the action.

2. We will never forget GOING to America a year ago. (gerund)
Explanation: In this sentence, the gerund form "going" is used as the object of the verb "forget". The gerund form is used to show that the action of going to America has already happened.

b.
1. He didn't mean TO HURT you at all! (infinitive)
Explanation: In this sentence, the phrase "to hurt" is used as the direct object of the verb "mean". The infinitive form is used to show the purpose or intention of the action.

2. It would mean QUEUEING for a long time. (gerund)
Explanation: In this sentence, the gerund form "queueing" is used as the object of the verb "mean". The gerund form is used to show the action of queueing.

c.
1. Now I regret BUYING the cottage that is so far from the centre. (gerund)
Explanation: In this sentence, the gerund form "buying" is used as the object of the verb "regret". The gerund form is used to show the action of buying.

2. I regret SAYING that you have failed the interview. (gerund)
Explanation: In this sentence, the gerund form "saying" is used as the object of the verb "regret". The gerund form is used to show the action of saying.