7. 表示度量/距离/金额/时间等的名词复数作主语时的主语一致。分两种情况：若表示数值（看作一个整体），谓语用单数；若表示数量（看作多个个体的总和），谓语用复数。如，
Three years have passed since we met last time.
Twelve were boys.
8.不定式/动名词/从句作主语时的主谓一致。
①单个不定式或动名词作主语，谓语用单数。两个或两个以上互不关联的事，谓语用复数。两个或两个以上密切关联为一件事，谓语用单数。如，
●To die for the people is a worthy death.
●Looking after the children is my full time job.
●When and where to hold the meeting is unknown.
Going to bed early and getting up early is a good habit.早睡早起好习惯。
②单个从句作主语时，谓语用单数。两个或两个以上，谓语用复数。由what引导的主语从句，根据整个谓语部分的意思确定谓语首词的数，因为，无法从what从句本身看出来单/复数what本身表示单数或复数意义都可以。
●Which of them was right was quite clear to us.
●When men first made use of electricity is not exactly known.
What we need are doctors. （根据表语doctors，谓语首词用复数）
What he says and does does not concern me.他的言行与我无关。（复数）
※链接：其它章节中讲到的主谓一致。1.总称名词和专有名词作主语时的主谓一致，参看第三章第三节冠词在总称名词/专有名词前的用法。2.不定代词(+of)作主语时的主谓一致，参看第四章第四节不定代词的用法总表。3.“the+形容词”作主语时的主谓一致，参看第八章第二节“the+形容词”的用法。4.定语从句的引导词作主语时的主谓一致，参看第十一章第五节.what/which/that引导的定语从句。