WILL (affirmative sentences) SUBJECT + WILL (‘ll) + VERB (INFINITIVE) I will/ (I’ll) go to Japan for my honeymoon. I will read that book.
WILL (negative sentences) SUBJECT + WILL NOT (won’t) + VERB (INFINITIVE) I will not/won’t go to Japan for my honeymoon. I will not/won’t read that book.
WILL (questions) WILL/WON’T + SUBJECT + VERB (INFINITIVE)...? W ill you go to Japan? W ill you read that book? Won’t you come home? *In formal English, we can say Will + subject + not…? Will you not go to Japan?
BE GOING TO (affirmative sentences) SUBJECT + VERB TO BE + GOING TO + VERB (INFINITIVE) I am going to sleep well tonight . You are going to make me cry.
BE GOING TO (negative sentences) SUBJECT + VERB TO BE (NEGATIVE) + GOING TO + VERB (INFINITIVE) I am NOT / I’m not going to sleep well tonight. You are NOT / You aren’t going to make me cry.
BE GOING TO (interrogative sentences) VERB TO BE + SUBJECT + GOING TO + VERB (INFINITIVE)? Are you going to sleep?
WILL OR GOING TO? -FOR PREDICTIONS: Will : if the prediction is based on what we know or think . I think the weather will be better next month. (It’s my opinion). Going to : i f the prediction is based on what we can see or hear . Look at those clouds! It’s going to rain. (There is evidence).
WILL OR GOING TO? -FOR PLANS: Will : when we are deciding what to do as we speak . I think I’ll have the pesto salad. (I’m deciding right now). Going to : when we have already decided what to do, it is planned . I’m going to Paris tomorrow, everything is ready! (I have planned it).
EXTRA INFORMATION -FOR PROMISES AND OFFERS → WILL Do you have a headache? I’ll get an aspirin for you. I’ll phone you later, I won’t forget. Yes, I’ll do my homework.