"See" means noticing and registering an impression. "Look" means to direct the gaze or the attention at something. "Watch" means a sustained act over a period of time. "Look, there's a deer!" "I don't see it." "But you're looking right at it! Just to the left of the tree." "Oh, yes! I see it now. Oh! it ran away." "Maybe if we keep watching we will see it again."

*See -to ‘see’ something that comes into our sight (not necessarily by choice). ‘Did you see that bird? (I wasn’t looking for it, it just appeared.) ‘I saw you driving to work today.’ *Look - to look at something specific for a reason, with an intention. ‘Look at that strange man.’ (I have chosen to direct my vision at him) ‘Look at the pictures I took on holiday.’ *Watch - to look at something for a extended period of time, usually at something which is moving/change. I love watching TV. (I watch the movement on TV for some time). ‘Watch here you are going! You almost stepped on my foot!’