How is lady macbeth a foil to macbeth?

She spoiled the character of macbeth and tries to control him by spurring macbeth to act. When a rather positive thought came to Macbrth, she obstructed it.

Nounnames a person, place, thing, or ideaadjective: modifies a noun or a pronoun and answers these questions: which? what kind of? how many?
adverb:modifies a verb, an adjective, or another adverb and answers these questions: when? where? how? how much? why?
pronoun:is used in place of one or more nouns or pronounspreposition: shows the relationship of a noun or a pronoun to some other word in a sentence
interjection:expresses emotion and has no grammatical relation to the rest of the sentence
verb:expresses an action or a state of being
conjunction:joins words or groups of words (phrases or clauses)