as / than 在連接詞的用法裡常常省略了「主詞、動詞」，造成英語學習者相當大的困擾！本文蒐集各種範例供讀者練習。建議在觀看前先點擊右方的 tag 了解 as 的基本用法。
本句原型是 as bad as (how bad it is) we thought。可以看到正常只會省 how bad 然而在超級省略規則下，主詞 it 動詞 is 全可省。
as (it) is often supposed = 如同常常被假設的
as (it is) often said = 如同常常被說到的。注意到被動語氣連 is 都省略掉了也是可行的！
as (it) is often the case = 如同（it = 它採用最新科技）這個常見的狀況。特別注意到本句的 be 動詞後面接的是名詞。這種狀況 is 省掉的話語感不佳，所以不省 is。
as the president said = 如同總統說的。
less than it promised = 比它承諾的少。可發現這邊的 than 與 as 用法一模一樣。
easier than (what is) done = 說比做簡單。可發現這邊的 than 與 as 用法一模一樣。
原句應為： as anything other than (what is) perfect 此處 what 指稱 anything。
more than (what) is listed = 比被列上去的還多。可發現這邊的 than 與 as 用法一模一樣。
超級省略 As & If, While, When, Than
這四個字當連接詞用時，可以把主詞動詞都省掉，只留下一個「副詞、介詞、形容詞」。
interpret sth as Adj = 以 … 理解。此用法僅留下形容詞 happy。原句應該是 interpret a neutral expression as (it is) happy.
as before = as they lovin’ it before。此用法留下副詞 before 修飾 it is。
as before = as it is before。此用法留下介詞 before。
than before = than it is before。和 as 的用法一模一樣。
as possible = as it is possible。
as explained = as it is explained。被動式形態的形容詞也 ok。
if successful = if it is successful。 additive = 添加劑。rangeland = 牧場。trough = 槽 ← 這個字長的很像 through，發音則很像中文。
if interested = if you are interested。
if interested 後面還可以接 in
if needed = if it is needed = 如果需要。 as needed = as it is needed = 如同所需要的。
while pregnant = while one is pregnant
when available = when it is available
if appropriate = if it is appropriate = 適當的話
if severe enough = if it is severe enough 超級省略還可以加一點修飾。 cosmetic = 表面的
if given too much (sth) = if it is given too much food。 dewormer = 驅蟲劑