名詞子句是指能扮演名詞角色的子句。名詞子句的功能： 作為句子的主詞、受詞 (直接受詞或間接受詞)、補語 (主詞補語或受詞補語)、或同位語。
名詞子句通常由某些特定的字起頭，如：連接詞 (that, if, whether)，疑問詞 (when, where, which, who, why, what, how)， 或關係代名詞 (which, who, whom, whose, that, whoever, whomever, whichever, whatever)。
That she made a perfect score pleased her parents.
她拿到一個完美的分數讓她父母感到高興。
名詞子句"That she made a perfect score"當作句子的主詞。若把"That"省略掉，"That She made a perfect score pleased her parents." 則句子有兩個動詞 "made" 和 "pleased"，文法上是不允許的。
It is hard to tell if he is conscious.
很難判斷他是否有意識。
名詞子句 “if he is conscious" 作為不定詞 to tell 的受詞。
Please ask mom what we are having for dinner.
請去問媽媽我們晚餐吃什麼。
名詞子句 "what we are having for dinner" 作為句子授與動詞 ask 的直接受詞。
Christopher's excuse was that he had forgotten to set his alarm.
克里斯托弗的藉口是他忘記設鬧鐘。
名詞子句 "that he had forgotten to set his alarm" 作為句子的主詞補語。
從屬連接詞 "that" 、"if" 、 "whether"所引導的名詞子句
My assumption is that this is only the beginning.
我的臆斷是這僅僅是一個開端
名詞子句"that this is only the beginning"當作句子的主詞補語。
He said that he was sick.
他說他生病了。
名詞子句當作動詞said的受詞。這裡的 that 有時也可以省略。He said he was sick.
Mom taught us that honesty is the best policy.
媽媽告誡過我們，誠實才是上策。
"S+V+O+O"的句型。名詞子句"that honesty is the best policy"作為直接受詞。
通常在直述句前面加上一個從屬連接詞 "that"，表示「那句話、那件事」。
The question is whether he knows how to ring up a sale.
問題是他是否知道如何銷售。
名詞子句"whether he knows how to ring up a sale"作為句子的主詞補語。
I don't know if she has a boyfriend.
我不知道她是否有男朋友。
連接詞 if，『是否』的意思，等同 whether。名詞子句"if she has a boyfriend"作為動詞know的受詞。
I wonder if _______ from Japan.
(A) is she (B) she is
我想知道她是不是來自日本。
名詞子句： if + she(S) + is(V)
_______ you drive or fly is up to you.
(A) Whatever (B) Whether
無論你是開車還是搭飛機由你自己做決定。
名詞子句: Whether you drive or fly
動詞 + that-子句
底下這些動詞後面經常跟著that-子句作為受詞
I expect that he will be late.
我認為(預料)他會遲到。
I insist that they take some time off.
我堅持他們需要休息一陣子。
在非正式的口語中，that-子句中的 that 經常被省略。
I think (that) I've met you before.
我認為我之前見過你。
Imagine (that) you have been elected President. What would you do?
試想一下你被選上了總統。 你會怎麼做？
疑問詞所引導的名詞子句
I don't know how she does it.
我不知道她是怎麼做到的。
Jeff asked me where his wallet was.
傑夫問我他的錢包在哪裡。
Circle the name of the city in which you grew up.
把你成長的城市名稱圈起來。
There is emoji for when you don't really know what to say, but don't want to be rude by not responding.
使用表情符號是在你真的不知道該說些什麼，但不希望因不回應而產生不禮貌的行為。
I did wonder who he was, so I found out.
我的確想知道他是誰，因此我就去查明。
Why I went there is anyone's guess.
誰（包含我自己）都不知道我為什麼會去那裡。
I'm not going to tell everyone what I had for lunch.
我不會告訴大家我午飯吃什麼。
動詞 tell 有兩個受詞，"everyone"是間接受詞，而名詞子句"what I had for lunch"是直接受詞。
What the man did was not very polite.
這個人的作為不是很有禮貌的。
名詞子句 "What the man did" 本身含有 the man (主詞) 和 did (動詞)。"What the man did" 作為句子的主詞，was 才是句子的主要動詞。
That is about where it ends.
這大約是它結束的地方。
名詞子句"where it ends"當作介系詞 about 的受詞。
I'm not going to tell you what _______ do.
(A) you should (B) should you
我不會告訴你你應該做什麼。
名詞子句："what you should do" - (疑問詞) + S + V
Mary asked me where _______
(A) was her credit card. (B) her credit card was.
瑪麗問我她的信用卡在哪裡。
名詞子句： where her credit card was，(疑問詞) + S + V
We only do _______ we do best.
(A) how (B) what (C) which (D) where
我們只做我們最擅長的事情。
名詞子句 "what we do best" 作為 do 的受詞。
請將正確答案拖放到適當的空格內，再按Solve鈕看結果。
我的父母主宰一切，且必須知道我所做的每一件事：我去哪裡，我和誰在一起，為什麼我要去。
My parents dictate, and have to know everything I do: I go, I’m with, I’m going.
Solve
三個名詞子句： where I go, who I’m with, why I’m going。
關係代名詞 "whoever", "whomever", "whatever", "whichever"所引導的名詞子句
Whoever has the most stars at the end of the game wins.
誰在比賽結束時擁有最多星星獲勝。
You're allowed to hate whomever you want, but you're not allowed to act on that hate.
你被允許恨你想要的任何人，但你不容許對那仇恨有所動作。
When his parents are not present, he does whatever he wants.
當他的父母不在場時，他做任何他想做的事情。
Whichever restaurant you pick is fine with me.
無論你挑選哪個餐館，我都可以。
名詞子句" Whichever restaurant you pick"當作句子的主詞。
名詞子句 "Whatever you decide" 當主詞使用。
值得一提的是名詞子句是一種從屬子句，因此它不能單獨存在。
whatever he wants.. (錯誤的句子，因為它不完整)
Whichever restaurant you pick. (錯誤的句子，因為它不完整)
請填入名詞子句適當的起頭字
間接問句裡的附屬子句
這是由直接問句 "Where is she? (她在哪裡?)" 轉來的間接問句。間接問句裡的附屬子句，如本例“where she is"是個名詞子句，它當作主要子句動詞"know"的受詞。附屬子句的主詞與動詞的位置要回歸到直述句或否定句（非疑問句）的順序：主詞在前，動詞在後。
名詞子句 "what Andy is doing these days" 當作主要子句動詞 knows 的受詞。請注意名詞子句內的主詞與動詞位置的順序：主詞(Andy )在前，動詞(is)在後。
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