分析 It's our duty to try our best.
解答 答案:It's our duty to try our best.这里是说客观事实用一般现在时,表示"做某事是某人的责任"用It is one's duty to do sth,其中it作句子的形式主语,代替后面的真正主语(动词不定式to do sth),我们的用形容词性物主代词our,故It's our duty to,尽最大的努力用try one's best to do sth,故答案是:It's our duty to try our best.
点评 it作句子的形式主语,代替后面的真正主语(动词不定式to do sth).类似的句型还有"It's+adj.(+for/of sb)+to do sth"意为"(对某人来说)做某事是…的",例如:
It's necessary for us to work hard.
对我们来说,努力学习是必要的.
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