初中·課本中不會(huì)教你的 539　It is +形容詞／名詞+for sb.+to do sth.

539　It is +形容詞／名詞+for sb.+to do sth.

　動(dòng)詞不定式用作主語(yǔ)時(shí)，常用it 作形式主語(yǔ)，放在句首，而把真正主語(yǔ)不定式移到句尾，這就是It is +形容詞／名詞+(for sb.) +to do sth. 結(jié)構(gòu)的來(lái)源。如果點(diǎn)明不定式動(dòng)作的執(zhí)行者，即不定式的邏輯主語(yǔ)，就在不定式前加上for sb., 表示“對(duì)……來(lái)說(shuō)”。參見本書有關(guān)部分。

It is easy for me to read the book. 對(duì)我來(lái)說(shuō)，讀這本書很容易。

It is important for us to learn English well. 對(duì)我們來(lái)說(shuō)，學(xué)好英語(yǔ)是重要的。

Is it necessary for us to leave so early? 我們這么早動(dòng)身有必要嗎？

It is really hard for Jim to pass the entrance examination. 對(duì)吉姆來(lái)說(shuō)通過(guò)入學(xué)考試真的很難。

It is possible for Tom to finish the work before Friday. 湯姆有可能在星期五前完成這項(xiàng)工作。

It is a good idea for us to travel to the north. 去北方旅行對(duì)我們來(lái)說(shuō)是個(gè)好主意。

It is easy to climb up the ladder. 爬上那個(gè)梯子很容易 。

It is not hard to climb up the ladder.

to climb up the ladder is easy.

It is hard to do the job. 這項(xiàng)工作很難做 。

It is not easy to do the job.

to do the job is hard.