由and连接的两个(或多个)
动名词或不定式作主语,如果并列的动名词或不定式语义相同或相似,谓语用单数；如果语义不一致,则谓语用复数.例如：
Lying and stealing are not right.
To love and to be loved is sweet to me.
Weeping and wailing does nothing towards solving the problem.
Reading Ibsen and solving maths problems are different assignments
两个或多个动名词短语并列作主语的时候
谓语动词是单数还是复数形式? 这要看叙述的是一件事还是两件以上， 如果是一件事，谓语动词是单数，如果是两件事，谓语动词是复数形式。
如：Going to bed early and getting up early is a good habit.
Watching TV and reading books are really interesting.
希望我能帮助你解疑释惑。