And连接的单数可数名词作主语,其前用every,each,no,many a等来修饰时,谓语动词用单数形式

如果前面不用的话：有两种情况
如果意义为复数,谓语动词用复数
如：The fishing and the hunting in Arizona were good that year.
如果作主语的并列结构不是指两个或两个以上的人或物,而是表示单数意义,则动词用单数.
如：Ham and eggs is a good breakfast.
用的话：都用单数
再问： Every train and bus was crowded with many people. 把every去掉怎么改
再答： Trains and buses were crowded with many people.吧^_^
再问： 那个蛋后面干嘛要加s 还有不可数名词用复数还是单数？ 如果用and的话不是都只是两个么 哪来两个以上哦
再答： 上面是一定要+s的吼 不可数名词用单数哦 有两个以上的哦，如 You,he and I are all friends.这就是一例哦