An apple a day keep the doctor away

An Apple a day might keep the doctor away? An apple a day,keep the doctor away. An apple a day ______(keep)the doctor away. An apple a day ,keep the doctor away! an apple a day ,keep the doctor away. an apple a day keep the doctor away 怎么翻译? 是An apple a day keep the doctor away.还是An apple a day keeps An apple every day,keep the doctor away. 请问“An apple a day,keep the doctor away.（是一句小谚语） 英语谚语1.Eat an apple a day ,keep the doctor away.2.DO not put 改错An apple a day keep the doctor away.答案上是把keep改成keeps,为什么啊? 英语翻译:eat an apple a day keeps the doctor away.