60 不定式作主語：It + … + to do sth. Track 060
60 不定式作主語：It + … + to do sth. Track 060
（1）It + … + to do sth.
不定式作主語，常見的是用it作形式主語，放在句首，將真正的主語——動詞不定式（短語）放在句子后面。
a. It is easier to spend money than to make money.
b. It takes time to study English well.
注意：此處形式主語it不能用this或that來替換。
This（A） is impossible for（B） people to stare directly（C） at the sun. 人們不可能直視太陽。
答案：A。This 改為It。
（2）不定式結構也可直接置于句首作主語，此時謂語動詞要用單數形式
例句
a. To err is human; to forgive, divine.
犯錯人皆難免，寬恕則屬超凡。
b. To solve this problem takes a genius like Einstein.
c. To love for the sake of being loved is human, but to love for the sake of loving is angelic.
d. To send a letter is a good way to go somewhere without moving anything but your heart.
不定式作主語，常見的是用it作形式主語，放在句首，將真正的主語——動詞不定式（短語）放在句子后面。
a. It is easier to spend money than to make money.
b. It takes time to study English well.
注意：此處形式主語it不能用this或that來替換。
This（A） is impossible for（B） people to stare directly（C） at the sun. 人們不可能直視太陽。
答案：A。This 改為It。
（2）不定式結構也可直接置于句首作主語，此時謂語動詞要用單數形式
例句
a. To err is human; to forgive, divine.
犯錯人皆難免，寬恕則屬超凡。
b. To solve this problem takes a genius like Einstein.
c. To love for the sake of being loved is human, but to love for the sake of loving is angelic.
d. To send a letter is a good way to go somewhere without moving anything but your heart.
