求助英语句子“Pleasefeelfreetocontactmehaveanyfurtherquestionsorconcerns.”
这个句子“shouldyou……”是不是等价于“ifyoushould……”.如果是的话,请给出语法上的理由,
完整的句子是“Pleasefeelfreetocontactmeshouldyouhaveanyfurtherquestionsor
concerns.”