Answer:
Shakespeare uses contrast and repetition to establish that the witches' value are the opposite of normal , " fair is foul and foul is fair " .
The witches are used to create dark magic and suspense .
The witches are evil , powerful and manipulative.also stagecraft is an important factor in presenting how unnatural they are . The witches speak in an ambigious way to trick macbeth .
Step-by-step explanation: