it is important_______.A.to careful B.to careless C.careful D.to be careful

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it is important_______.A.to careful B.to careless C.careful D.to be careful
it is important_______.A.to careful B.to careless C.careful D.to be careful

it is important_______.A.to careful B.to careless C.careful D.to be careful
选d, 考不定式作主语
it 是形式主语,不定式是真正的主语.
作主语的可以是名词,代词,不定式,动名词,不能是形容词,副词.
a, b,没有这种用法,c 是形容词,不能作主语.

选D
it is ... to do sth.是固定搭配，是个不定式结构。
careful是个形容词，前面不能直接接to，必须有个系动词be

选D

D It is important （for sb.）to do(动词原形)……
因为这里的be是动词原形，careful为形容词，“小心的”，构成了系表结构。句子翻译为“小心很重要”

这个题目选D
我们来分析这个题目important是个形容词所以用it is 来引导这个句子的话那么important后面就只能接一个从句了根据选项的意思本题想表达的是细心是很重要的于是 B可以排除因为B是粗心的意思再看其他选项那么后面接的都是动词不定式那么后面只能接动词原形那么根据这个原则的话我们只能选D...

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