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It 作虛主詞的常見句型

表示主觀意見價值判斷的形容詞important(重要的)necessary(必要的)essential(必要的)vital(極為重要的)imperative(絕對必要的)crucial(緊急的)proper(適當的)advisable(合情理的)fitting(適當的)urgent(迫切的)natural(自然的)traditional(傳統的)resolved(決定的),appropriate (適當的),此類型的形容詞不論人稱或時態,動詞一律(Should)+VR

It is necessary that Mike (should) be punished by his parents.

 

It +be(not) +adj./N +(for sb/sth)+ to VR..

形容詞為修飾to VR後的事情 for人是指對某人而言

It is important for people to take good care of their health.

 

It+ be + adj.+ of+ sb + toVR..

形容詞若修飾的是人內心的狀態介系詞為of

It is very kind of you to help me with homework.

 修飾人性形容詞(personal adjective)如:nice, good, wise, right, wrong, foolish, forward(上進的), generous, stingy(小氣), intelligent, kind, polite, ill-natured, careless, bold, brave, considerate(體貼的), thoughtful(考慮周到的), cruel, impudent(厚顏無恥), imprudent(魯莽), naughty, silly, rash(性急的), wicked, selfish, rude, unreasonable(無理性的,不懂道理的,不講理的), arrogant, ...etc.

optimistic 樂觀的courageous 勇敢的 honest 誠實的      witty 機智的
clever
聰明的adaptable 適應力強的humorous 幽默的    caring 關心人的
loyal
忠心的helpful 熱心助人的diligent 勤勉的      down-to-earth 實際的
diplomatic
圓滑的lively 活潑的outgoing 外向的     ambitious 雄心勃勃的
aspiring
向上的sincere 誠懇的compassionate 富同情心的straightforward 直率的jealous 善妒的impulsive 衝動的indecisive 優柔寡斷的        aloof 冷漠的fussy 挑剔的stubborn 固執的inflexible 死板的unreliable 不可靠的
forgetful
健忘的careless 粗心的superficial 膚淺的  stingy 小氣的
pessimistic
悲觀的quick-tempered 易怒的arrogant 傲慢的    possessive 佔有慾強的greedy 貪心的reckless 魯莽的bossy 愛指揮他人的   suspicious 多疑的

 

It+ takes/needs/requires+O+toVR

It needs no proof to show parents’ love for their children.

 

It is + N + to V

It is a pleasure to talk to you.

 

It + be + N/adj.+ V-ing

It is no use crying over spilt milk.

It is a waste of time arguing about the political issue.

It + is/was + N(P) + that-clause  (此為關代句)
It is my uncle that cooks meals for his family, not my aunt.
It was last Sunday that the crowd staged a protest.

 

 

It + be (not) + adj. + that-clause . . .

此種以it作虛主詞的用法在英文中很常見。習慣上,英文句子的其他部分通常比主詞長,然而,如果主詞太長,往往會以it當虛主詞,而把真正的主詞往後移,以避免「頭重腳輕」的狀況。it作虛主詞時,後方的真主詞可以是不定詞、動名詞或名詞子句,而本課所介紹的是that所引導的名詞子句。請注意that子句當主詞時,不可以省略that
另外,此句型多用來「表達事實」或「發表意見」。教師可以提醒學生一些常用於此句型的形容詞,像是clearlikelysad importantpossiblestrangeinteresting probabletruecertainsurprising等。

It is clear that the young man is lying.
It is likely that Andy will come to our place.
It is interesting that some people look like their pets.
除了that所引導的名詞子句,whetherhow引導的子句也可以用於以it為虛主詞的句型中,例:

It is uncertain whether the vacancy will be filled soon.

It is amazing how Anne can collect so many stamps.

 

As soon as /Once/ On+ v-ing/ Hardly when ~~文法

  表雖然although /Much as/ Despite /In spite of 句型

  that 同位語     英文文法分詞構句與獨立分詞構句

  It 作虛主詞的常見句型    A along with B 使用方式      英文倍數比較級

  視A片語        複合形容詞       易搞混難分辨的動詞(1)     

  主詞動詞一致 note    接動名詞的動詞片語 notes     

  prefer to rather than 文法           rise arise raise arouse 使用方式 notes       

  準關係代名詞 as but than文法 notes    英文分數表示法 英文倍數 notes

  It is/was 被強調部分+ that 子句 強調句文法

  英文worth worthy worthwhile用法 notes         

  數量詞筆記       形容詞的順序與位置 notes         Be known for,as, to 的差別

  If 假設語氣文法      12月份英文記憶口訣 

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