Stop Smoking or Stop to Smoke? (gerunds and infinitives)

Choose A or B.

-ing or to ...

The –ing form (gerund) functions like a noun and describes a general activity.
The to .. form (infinitive) is a verb and indicates a particular action.

When you remember something you have a picture in your mind of something (an object, a person, an activity) you saw or heard in the past.

When you remember to do something you keep an idea in your mind of an action you have to do in the future.

When you stop something (an object, a person, an activity) you stop something that already exists in the present.

When you stop to do something you stop (a present activity) in order to do an action in the future.