动名词做主语时，谓语动词用单数还是复数？

非谓语动词作主语时谓语用单数.但是如果是两个并列的就象是两个名词并列时候就用复数了.给你两个例子吧
To learn english well, listening is very important.
listengling作主语,动词用is
To learn Enlish well, listening and speaking are very important.
这句话中主语是listening和speaking，所以用了动词are

谓语动词用单数。

单数