一、谓语动词在人称和数上必须和主语一致1The results of the experimentshowthat you have all made good progress.2Between the two buildingsstandsa monument.二、如果主语是一个抽象概念,谓语动词用单数1Growing vegetablesneedsconstant watering.2That we have made brilliant achievementsisan iron fact.三、由and并列的两个名词做主语时，如果表示的是一个同一概念或者单数概念，谓语动词用单数，否则用复数1The iron and steel industryisvery important.2The teacher and poet oftengiveslectures around the city.3. The teacher and the poet are good friends in the city.
