what從句作主語(yǔ),如果表示的是單數(shù)意義,則謂語(yǔ)動(dòng)詞用單數(shù)形式；如果表示的是復(fù)數(shù)意義,則謂語(yǔ)動(dòng)詞用復(fù)數(shù)形式
（what）從句作主語(yǔ),謂語(yǔ)動(dòng)詞用單數(shù)形式
兩個(gè)（以上的）并列的從句作主語(yǔ),謂語(yǔ)用復(fù)數(shù)；
不定式作主語(yǔ),謂語(yǔ)動(dòng)詞用單數(shù)形式
兩個(gè)（以上的）并列的不定式作主語(yǔ),謂語(yǔ)用復(fù)數(shù)；
動(dòng)名詞作主語(yǔ),謂語(yǔ)動(dòng)詞用單數(shù)形式
兩個(gè)（以上的）并列的動(dòng)名詞作主語(yǔ),謂語(yǔ)用復(fù)數(shù)；舉例子好嗎What I want to see is your manager.When and where we will go has not been decided.How we can finish the job and when they will come to help us to do the job are what we should consider.Getting up early is not an easy job.Getting up early and doing some exercises are what we should do in the morning.To see is to believe.