need doing是实义动词还是情态动词？ 怎么区分need的句中是情态动词还是实义动词
need\u7528\u4f5c\u60c5\u6001\u52a8\u8bcd\u548c\u5b9e\u4e49\u52a8\u8bcd\u7684\u533a\u522b\u533a\u522b\uff1a
1.\u7528\u4f5c\u60c5\u6001\u52a8\u8bcd\u65f6\uff0c\u6ca1\u6709\u4eba\u79f0\u3001\u65f6\u6001\u548c\u6570\u91cf\u53d8\u5316\uff1b\u53ea\u80fd\u7528\u4e8e\u7591\u95ee\u53e5\u548c\u5426\u5b9a\u53e5\uff0c\u7591\u95ee\u53e5\u76f4\u63a5\u628aneed\u653e\u5728\u4e3b\u8bed\u524d\u9762\uff0c\u5426\u5b9a\u53e5\u76f4\u63a5\u52a0not\uff0c\u540e\u9762\u90fd\u8ddf\u52a8\u8bcd\u539f\u5f62\u3002\u5982\uff1a
Need I do it right now?
\u6211\u9700\u8981\u9a6c\u4e0a\u505a\u5417\uff1f
You needn't have apologized to her. It was not your fault.
\u4f60\u672c\u4e0d\u5fc5\u5411\u5979\u9053\u6b49\uff0c\u90a3\u4e0d\u662f\u4f60\u7684\u9519\u3002
2.\u7528\u4f5c\u5b9e\u4e49\u52a8\u8bcd\u65f6\uff0c\u6709\u4eba\u79f0\u3001\u65f6\u6001\u548c\u6570\u91cf\u53d8\u5316\u3002\u53d8\u7591\u95ee\u53e5need\u4e0d\u80fd\u653e\u5728\u4e3b\u8bed\u524d\u9762\uff0c\u53d8\u5426\u5b9a\u53e5need\u4e0d\u80fd\u76f4\u63a5\u52a0not\uff0c\u90fd\u8981\u7528\u5230\u52a9\u52a8\u8bcddo\u3001does\u6216\u8005did\u6765\u5e2e\u52a9\u3002\u5b9e\u4e49\u52a8\u8bcdneed\u540e\u9762\u52a8\u8bcd\u8981\u7528\u975e\u8c13\u8bed\u52a8\u8bcd\u5f62\u5f0fto do\u6216\u8005doing\u3002\u5982\uff1a
He needs to learn English well.
Does he need to learn English well?
He doesn't need to learn English well.
The classroom needs cleaning.\u6559\u5ba4\u9700\u8981\uff08\u88ab\uff09\u6253\u626b.
=The classroom needs to be cleaned.
\u60c5\u6001\u52a8\u8bcd\u65f6\u6ca1\u6709\u53d8\u5316\u5f62\u5f0f\uff0c\u540e\u52a0\u52a8\u8bcd\u539f\u5f62\uff0c\u5e38\u7528\u4e8e\u5426\u5b9a\u53e5\u548c\u7591\u95ee\u53e5\u4e2d\u3002
You needn't buy the tickets.
\u5b9e\u4e49\u52a8\u8bcd\u65f6\u6709\u4eba\u79f0\u65f6\u6001\u7b49\u53d8\u5316\u5f62\u5f0f\uff0c\u5426\u5b9a\u7591\u95ee\u65f6\u8981\u7528\u5230\u52a9\u52a8\u8bcd\u3002
We need two books.
He didn't need to take part in the club.
Tom needs a pen to write down the plan.
Do you need to clean up the shelf\uff1f
做实意动词时，
1.need to do sth.需要做某事
例句：
I need to study hard for th exam.我需要为了考试努力学习。
He needed to drink some water.他需要喝些水。
2.need doing sth. 需要被做某事（=need to be done sth.）
例句：
The flowers need watering every day.花需要每天（被）浇水。
The classroom needs cleaning.教室需要（被）打扫。
附加说明：
need为情态动词的时候后面接动词原形，通常只用疑问式或否定式。
1、Need doing,其中need是实义动词，
例如My bike needs repairing.我的自行车需要修理（自行车被修理）。
2、Need to do sth则表示主动I need to drink water.
3、Need sth 以上都是实义动词用法。She needs some help.
只有need+do sth结构才能是情态动词用法。
例如 Must I go home now? No,you needn't.
扩展阅读：need doing表示被动 ... need doing用法 ... need to do还是doing ... need do与need doing ... sth needs doing sth ... 为什么need doing表被动 ... need doing是什么意思 ... need to be done ... need to do和need do的区别 ...
