think about what( )would be like to be free of those limitat

what 引导宾语从句作介词about的宾语 并在宾语从句中 作介词like的 宾语
在宾语从句中 it是形式主语 后面的不定式 to be free of those limitations是 宾从中 的真主语
不能用you 作宾语从句中的主语 因为意思不通
再问： 用YOU也可以翻译通呀
再答： what you would be like to be free of those limitations.
动词不定式 无法解释
应该是 what you would be like if you were free of those limitations.