计划、打算 or 准备

 计划、打算 or 准备

计划 sounds more formal, implying you have deep thought on it and well planned, maybe you have made a list for things you intend to do, and you might have detailed schedule, budget and etc.

Example: “我计划去学习” (I want to study and I have a study plan)

 

打算 is more colloquial or less formal. It's usually just rough idea about what you are going/wanting to do, and you might not have it well planned. 

Example：“我打算去学习” (I want to study, but It’s just a thought)

 

We tend to use 打算 in spoken when you are going to do something specific(not that complicated or important), like 我打算去逛街，我打算找个朋友聊聊天. We don't usually say 我计划找个朋友聊聊天 in this case, which sounds a bit pretentious I think.

 

准备 is more to describe readiness in preparation (accurate, certainty, etc)...

Example：我们准备搬到美国； emphasizing the need for specific preparations for the move.

 

练习：计划、打算 or 准备

1.  我今天晚上要_________下个星期的早饭。

2.  新的学期开始了，我要写一个学习_________。

3.  我_________星期天和朋友去买东西。

4.  明天的考试，你_________好了吗？

5.  周末你要去看电影？我也有这个_________。

6.  我_________2021年毕业。