at least one 后面应该+单数,记得有个系统错误提示是,at least one service or driver failed during system .
many a ...或more than one...,谓语动词采用单数形式.
rain and fog的话,应该就是并列结构作主语时谓语用复数,后面用are.
如果前面有冠词就要注意: 当主语由and连结时,如果它表示一个单一的概念,即指同一人或同一物时,谓语动词用单数,and 此时连接的两个词前只有一个冠词.
at least one 后面应该+单数,记得有个系统错误提示是,at least one service or driver failed during system .
many a ...或more than one...,谓语动词采用单数形式.
rain and fog的话,应该就是并列结构作主语时谓语用复数,后面用are.
如果前面有冠词就要注意: 当主语由and连结时,如果它表示一个单一的概念,即指同一人或同一物时,谓语动词用单数,and 此时连接的两个词前只有一个冠词.