Actually, the explanation about 'stop' is not correct. "Stop smoking" means that the activity of smoking finishes. Ths can mean the habit of smoking or one cigarette. e.g. "I stopped smoking years ago because I was worried about my health." e,g, "Stop smoking that cigarette and get on with your work!" "Stop to smoke" means this is WHY you STOP. e.g - We have been driving for hours. Let's stop. - Why? - To smoke a cigarette, drink a coffee and go to the bathroom. So, in this situation, why did they stop? They stopped to smoke, drink a coffee ...

thanks Johanna for your answer i understand now :D

i stop smoking = I quit, I stop smoking forever i stop to smoke = I stop for the moment, I kill my cigarete and stop until I smoke the next one i remember eating = I remember a moment when I was eating, like "I remember eating vanilla ice cream last summer" i remember to eat = happens NOW : "oups, I nearly forgot but I have to eat now, so I will"

i stop smoking