The word 'don't' is a contraction of the words 'do not.' When adding 'have time to' you are simply stating that you have other obligations and all other things considered must wait.

'don't'这个词是'do not'的缩写形式，当加'have time to'的时候就简单的表明你有其他必须要做的事情而所有其他的事情必须要等一下。

Here are some examples: 这里有一些例子： 

"I don't have time to explain."

 我没有时间解释。

"I don't have time to eat."

 我没时间吃东西。

"I don't have time to exercise."

 我没时间锻炼。

"I don't have time to watch my favorite TV show."

 我没时间去看我最喜欢的电视节目。

"I don't have time to talk."

 我没时间聊天。

You can also use the phrase 'I don't' to express things you do not like, things you do not understand, or things you do not do.

你也可以用'I don't'这个短语来表达你不喜欢的事情，你不懂的事情，或者你不会去做的事情。

Here are some examples: 这里有一些例子： 

"I don't eat meat."

 我不吃肉。

"I don't like the rain."

 我不喜欢下雨。

"I don't understand Spanish."

 我不懂西班牙语。

"I do not understand what you are saying."

 我不明白你在说什么。

"I do not like scary movies."

 我不喜欢恐怖电影。

"I do not like sports."

 我不喜欢运动。