【葛底斯堡演说】求葛底斯堡演说最后一段句子成分划分

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【答案】 It is rather for us to be here dedicated to the great task remaining before us:that from these honored dead we take increased devotion to that cause for which they here gave the last full measure of devotion; that we here highly resolve that these dead shall not have died in vain; that the nation shall.under God,have a new birth of freedom,and that government of the people,by the people,for the people,shall not perish from the earth.
　　“It is rather for us to be here dedicated to the great task remaining before us.” 是主句.it是形式主语,真正主语是后面的不定式—to be here dedicated to the great task remaining before us.感觉主句中省略了表语—necessary.完整的应该是：It is rather necessary for us to be here dedicated to the great task remaining before us.
　　后面的4个that 从句是task 的同位语来补充说明它的.