'I am going to do something' = I have already decided to do it. A : There's film on television tonight. Are you going to watch it? B : No I'm tired. I'm going to have an early night. A : I hear Ruth has won some money. What is she going to do with it? B : She's going to buy a new car. I am doing and I am going to do We normally use I am doing (present continuous) when we say what we have arrange..