Question

两个动名词作主语时，谓语动词用复数么

Swimming and dancing are/is my hobbies??选哪个？

Answer 1

are
由and连接的两个主语，如果表示同一个概念就用单数。两个概念就用复数
游泳和跳舞时两个事物，用复数

Answer 2

引用：
a) 由and连接两个名词或者代词作主语时

A and B分为以下四种情况：

i. A、B表示不同的人、物或者观念的时候，谓语动词要用复数形式

Li Ming and Zhang Hua are good students.

Both the parents and the children are here.

ii. A、B表示同一个人、物或者观念的时候，谓语动词要用单数形式

A journalist and author lives in the sixth flat.

The turner and fitter is under twenty-five.

iii. And连接几个单数主语，主语由each、 every、 no、 many等词修饰的时候，谓

语动词要用单数

Each boy and each girl is invited.

Every boy and girl is invited.

No boy and no girl is there now.

iv. A、B为两个不可分的东西时，谓语动词用单数

A law and rule about protecting environment has been drawn up.

Bread and butter is nutritious.