The correct answer to the sentence "My wife ____________ (not cook) today" is "is not cooking". Here is the explanation of this answer:


The sentence is in the present continuous tense which is used to describe an action that is happening at the moment of speaking. It is formed by using the verb "to be" in the present tense followed by the present participle (-ing) of the main verb.


The sentence is also in the negative form which means that the action is not happening. To form the negative form in the present continuous tense, we add "not" after the verb "to be".


The subject of the sentence is "my wife" which is in the third person singular form. Therefore, the verb "to be" should also be in the third person singular form which is "is".


Based on the rules above, we can form the correct answer to the sentence "My wife ____________ (not cook) today" by following these steps:

- Identify the tense as present continuous
- Identify the negative form
- Use the third person singular form of the verb "to be" which is "is"
- Add "not" after the verb "is"
- Use the present participle (-ing) of the main verb "cook"

Therefore, the correct answer is "is not cooking".