如何制作所有可能的序列，但像 n-grams 这样的方法

如何解决如何制作所有可能的序列，但像 n-grams 这样的方法

新手问。我想做一个这样的程序：

example: text = 'I playing basketball today'

2 gram > 'I playing','I basketball','I today','playing I','playing basketball','playing today','basketball I','basketball playing','basketball today','today I','today playing','today basketball'
3 gram > 'I playing basketball','I basketball today','I playing today','playing I basketball','playing I today','playing basketball today','basketball I playing','basketball I today','basketball playing today',etc.
etc gram.

我使用 n-gram 并得到这样的结果

2 gram > 'I play','play basketball','basketball today'
3 gram > 'I play basketball','play basketball today'

如何像例子一样操作？或者这有可能吗？

我不知道它是什么方法名，所以我在google上找不到

抱歉让您感到困惑，感谢您的帮助。