如何判断need在再句中的词性?! need有两种词性，怎样区分
\u600e\u4e48\u533a\u5206need\u7684\u8bcd\u6027\uff1f\u5982\u679cneed\u505a\u60c5\u6001\u52a8\u8bcd\u90a3\u4e48need\u76f4\u63a5\u52a0\u52a8\u8bcd\u539f\u5f62\uff0c\u5426\u5b9a\u53e5\u7684\u8bdd\u76f4\u63a5needn't do
\u800cneed\u5982\u679c\u4e0d\u505a\u60c5\u6001\u52a8\u8bcd\u7684\u8bdd\u5c31\u662fneed to do\uff0c\u5426\u5b9a\u53e5\u662fdon't need to\u3002
\u6240\u4ee5\u8fd9\u4e2a\u9898\u9009A\uff0cB\u9879\u9519\u5728\u6ca1\u6709to
\u5148\u4e0d\u770bneed\uff0c\u770b\u53e5\u5b50\u4e2d\u6709\u6ca1\u6709\u52a8\u8bcd(\u8c13\u8bed)\uff0c\u5982\u679c\u6709\uff0c\u4f46\u6ca1\u6709\u7528\u4e0d\u5b9a\u5f0fto\u8fde\u63a5\u7684\uff0c\u90a3\u4e48need\u662f\u60c5\u6001\u52a8\u8bcd\uff1b\u5982\u679c\u6ca1\u6709\u6216\u4e0eneed\u4e4b\u95f4\u6709\u4e0d\u5b9a\u5f0fto\u8fde\u63a5\uff0c\u90a3\u4e48need\u662f\u4f5c\u4e3a\u52a8\u8bcd\u7684
记住二点，1-情态动词后面接原形 2-情态动词本身不受主语人称及时态影响而有变化.如: I need to go. He needs your help. 动词
实义动词的用法 need sth. 或 need to do
否定借助助动词do 或does, 变为don't need 或doesn't need
第三人称单数要变为needs
情态动词的用法 need do sth.
否定为needn't
无人称的变化
当need后加动词原形即need+do+sth时,则need作情态动词
当need后加动词不定式即need+to+do+sth时，则need是实义动词
或者根据need
在句中有无时态和人称的变化，有则是实义动词，没有则是情态动词
当情态动词的时候直接加动词原形，
当实意动词的时候加动词不定式。
一般在反意疑问句中才分这么清楚的。
根据意思
形式
搭配来判断
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