I forgot to call my mother.
I remembered to buy milk.
I stopped working when I was expecting a baby.
This is when you are sorry about something you did in the past and you wish you hadn't done it. (gerund)
We use this construction when we are giving someone bad news, in quite a formal way. The verb is almost always something like "say" or "tell" or "inform". (infinitive)
It's when you want to do something, but you forget about it. (infinitive)
I regret going to bed so late. I'm really tired today.
In this case, we stop something in order to do simething else. (infinitive)
When we stop doing something, it means the verb in the gerund is the thing that we stop. It can mean "stop forever" or "stop at that moment". (gerund)
Have we really studied this topic before? I forget reading about it.
This is when you think of something that you need to do. (infinitive)
This is when you remember something that happened in the past. (gerund)
I remember going to the beach when I was a child.
She was shopping and stopped to get a cup of coffee.
I regret to tell you that the train has been delayed.
It's when you forget about a memory, something that you did in the past. (gerund)
