※ 引述《gecer (gecer)》之銘言：
: The Invisifence process was smooth, quick, and surprisingly affordable --
: much cheaper than putting a real fence around my yard would have been.
1.) The Invisifence process was smooth, quick, and surprisingly affordable --
much cheaper than putting a real fence around my yard would have been
[cheap].
1.1.) The Invisifence process was smooth, quick, and surprisingly affordable.
...
1.2.) The Invisifence process was much cheaper than putting a real fence
around my yard would have been [cheap].
1.21.) The Invisifence process was much cheaper.
...
1.22.) Putting a real fence around my yard would have been less cheap.
1.221.) x would have been less cheap.
...
1.222.) y puts a real fence around my yard.
雖然，一個比較容易的例子可以幫您了解"would have"的意思。
人類可以想像反事實的情況(counterfactual situations)，
只是以為世界跟我們的實際的世界不一樣。
例如，對實事而言：
"The sun is hot."
我們想像反事實的情況就是說：
"The sun not be hot."* （不可脫離中寫這個句子，可是可以放在指示的句子，例如：
"When people think about going into space, they might suspect
that the sun not be hot."）
英文動詞有一種虛擬語氣(subjunctive mood)，上面的句子利用現在式(present
[tense,] subjunctive [mood])。
可是我們要利用過去式：
"The sun were not hot."*
我們也可以推斷真實的預見、想像的結果等：
指示的："If the sun is hot, then Venus is hotter than Earth is [hot]."
反事實的： "If the sun were not hot, then Venus would not be hotter than
Earth would be [hot]."
增加perfect mood("完美語氣？")：
指示的："If the sun has been hot since 1965, then Venus has been
hotter than Earth has been [hot] since then.
反事實的： "If the sun had not been hot since 1965, then Venus
would not have been hotter than Earth had been [hot] since then.
有比較細節的回答，可是它需要我介紹模態邏輯解釋。
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 101.12.141.62
※ 編輯: theyangist 來自: 101.12.141.62 (05/14 03:56)
※ 編輯: theyangist 來自: 101.12.141.62 (05/14 03:57)