Answer: The subject of the sentence provided is "He".
Explanation: The subject of a sentence is the thing, person or animal being, doing or feeling something. A subject may include a head and its modifiers. Moreover, the simple predicate of a sentence makes reference to what the subject is, does or feels. In the sentence provided,<u> the subject is "he", which is a personal pronoun and; therefore, refers to a person.</u> Furthermore,<u> the verb ("checks") indicates what "he" is doing. </u>
If im on the right track then a way to right it with dashes would be: Sacrificing her was a mistake-a mistake that could have been avoided. but i may not have understood the question??
