What's the difference of an interrogative sentence starting with "do" and "don't"?
Native speaker’s answer
Rebecca
Interrogatives that have a “yes” or “no” answer are usually found with auxiliary verbs at the beginning of the sentence, in this case, "do". To make them negative, we generally add the word "not" after the subject of the sentence. However if "not" is contracted with the auxiliary verb, then the contraction comes before the subject, in this case, "don't". Negative interrogatives usually imply that the speaker expects the answer to be (or believes the answer should be) “yes.” So here she expects the answer to "don't people need good cars" to be "yes". Ex: Don't you have homework? Ex: Don't you think you should apologise?