题目内容
12.necessary,do.It is necessary to do exercise..
分析 锻炼是必要的.
解答 答案:It is necessary to do exercise.图片上是一些人在做锻炼,necessary是形容词"必要的",故造句每天锻炼是必要的.是在说客观事实用一般现在时,用句型it's+adj+to do sth,it是形式主语,动词不定式是真正主语,do exercise做锻炼.故答案是It is necessary to do exercise.
点评 it's+adj.+for sb.to do sth.结构是一个陈述句,表示说话人对客观事件的决断,比较正式,希望大家学习时注意. 若形容词是描述不定式行为者的性格、品质的,如kind,good,nice,right,wrong,clever,careless,polite,foolish等,用of sb..
It's very kind of you to help me.你能帮我,真好.
It's clever of you to work out the maths problem.你真聪明,解出了这道数学题.
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