复数
both...and...两个都;既...又...
请看例句
Both Mr.Parmenter and Mr.Robbins live in the United States.
帕蒙特和罗宾斯先生都生活在美国.
Both Mr.Sans and Prof.Mei were fairly sanguine about the future of art.
杰罗姆•桑斯和梅建平对艺术的未来都相当乐观.
neitherof.....作主语谓语动词必须用单数。neitherofthemisright.
both...and...作主语谓语动词必须用复数bothlilyandlucyarestudents.
类似的还有either...or...,notonly...butalso...这两个作主语时谓语动词的单复数由第二个主语来决定。
eighterheoryouareastudent.
notonlyyoubutalsoheisastudent.
对的