1. 关于“打算”
　　原先作好的打算用“be going to”。
　　“Kate is in hospital.” “Yes, I know. I am going to see her this afternoon.”
　　“凯特在住院。”“是的，我知道。我下午要去看她。”
　　说话时即时的打算用“will”。
　　“Kate is in hospital.” “Oh, really, I didn’t know. I will go and see her at once.”
　　“凯特在住院。”“哦，是吗?我都不知道呢。我得马上去看她。”
　　2. 关于“预料” 在有迹象表明的情况下的预料用“be going to”
　　Look at the clouds. It’s going to rain. 你看天上的云。快下雨了。
　　My God! We are going to crash. 天哪!我们快撞车了。
　　在没有迹象表明的情况下进行的猜测用“will，be going to”皆可。
　　I think the weather will be nice.
　　I think the weather is going to be nice. 我想天会晴朗。
　　Do you think the car will start?
　　Do you think the car is going to start? 你想车能发动起来吗?
　　当动词表示内心活动时，表示猜测的句子必须用“will”
　　I think she will like the cake I made for her. 我想她会喜欢我为她做的蛋糕。