Real iy is doing the right thing，knowing that nobody’s going to know whether you did it or not.（Oprah Winfrey）
（4）由名詞性關係代詞what，whatever，whichever，whoever引導的賓語從句。如：Winning is important to me，but what brings me real joy is the experienbsp;of being fully engaged in whatever I’m doing.（Phil Ja）
（5）連接代詞和連接副詞以及連接詞whether等詞引導的名詞性從句還可以成為介詞的賓語。如：Don’t throw away the old bucket until you know whether the new one holds water.（Swedish Proverb）Her daughter endeavored to vinbsp;her of what she did not believe herlf.（Pride and Prejudice）From what she saw，to be very riously in love，their preferenbsp;of eabsp;other wan plain enough to make her a little uneasy.（Pride and Prejudice）
（6）that引導的賓語從句在以下情況下引導詞that不可省略：① 兩個或兩個以上賓語從句並列使用。如：To know that we know what we know，and that we do not know what we do not know，that is the true knowledge.Be fit for more than the thing you are now doi everyone know that you have a rerve in yourlf； that you have more power than you are now using.If you are not too large for the plabsp;you occupy，you are too small for it.（James A.Garfield）
② 動詞和賓語從句間存在插入語。如：We decided，in view of his special circumstahat we would admit him for a probationary period.
3.名詞性從句作表語（表語從句）
表語從句一般由that引導，也可由連接代詞和連接副詞以及連接詞whether來引導。
（1）由that引導的表語從句。如：A sign of celebrity is that his name is often worth more than his rvices.（Daniel J.Boorstin）The nibsp;thing about being a celebrity is that when you bore people，they think it’s their fault.（Henry Kissinger）
The fabsp;is that the ents that have been made and the issues that have surfabsp;over the last few weeks reflebsp;the plexities of rabsp;in this try that we’ve never really worked through a part of our union that we have yet to perfect.（Baraa）
The real problem is not that someone who doesn’t look like you might take your job； it’s that the corporation you work for will ship it overas for nothing more than a profit.（Baraa）
（2）由連接代詞和連接副詞以及連接詞whether引導的表語從句（whether不能換作if）。如：The test of our progress is not whether we add more to the abundanbsp;of tho who have mubsp;it is whether we provide enough for tho who have too little.（Franklin D.Roovelt）