(1/2)don't need to do sth和needn't to do sth 有什么区别？（to do sth是我自己加上去的，不知道 Need do 和 need to do 区别
need to do sth,need do sth. needn`t do sth\u548cdon`t need\u6709\u4ec0\u4e48\u4e0d\u540c\uff01need to do sth\u5b9e\u4e49\u52a8\u8bcd
need do sth. \u6ca1\u6709\u8fd9\u79cd\u7528\u6cd5\uff0c\u6709need doing\uff0c\u8868\u88ab\u52a8
needn`t do sth\u60c5\u6001\u52a8\u8bcd
don`t need\u5b9e\u4e49\u52a8\u8bcd
\u201cneed\u201d\u53cc\u91cd\u89d2\u8272\u7684\u7528\u6cd5\u53ca\u5176\u533a\u522b
\u201cneed\u201d\u65e2\u53ef\u4ee5\u4f5c\u60c5\u6001\u52a8\u8bcd\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u5b9e\u4e49\u52a8\u8bcd\uff0c\u4f46\u662f\u5b83\u4eec\u7684\u7528\u6cd5\u4e0d\u540c\u3002
\u4f5c\u4e3a\u60c5\u6001\u52a8\u8bcd\u7684\u201cneed\u201d\u7684\u7528\u6cd5\u4e0e\u5176\u4ed6\u60c5\u6001\u52a8\u8bcd\u201ccan\u201d\uff0c\u201cmay\u201d\uff0c\u201cmust\u201d\u7684\u7528\u6cd5\u57fa\u672c\u76f8\u540c\uff1a\u5728\u9650\u5b9a\u52a8\u8bcd\u8bcd\u7ec4\u4e2d\u603b\u662f\u4f4d\u5c45\u7b2c\u4e00\uff0c\u6ca1\u6709\u975e\u9650\u5b9a\u5f62\u5f0f\uff0c\u5373\u6ca1\u6709\u4e0d\u5b9a\u5f0f\u3001-ing\u5206\u8bcd\u6216-ed\u5206\u8bcd\u7b49\u5f62\u5f0f\uff1b\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u73b0\u5728\u65f6\u6ca1\u6709\u8bcd\u5f62\u53d8\u5316\uff1b\u60c5\u6001\u52a8\u8bcd\u4e4b\u95f4\u662f\u76f8\u4e92\u6392\u65a5\u7684\uff0c\u5373\u5728\u4e00\u4e2a\u9650\u5b9a\u52a8\u8bcd\u8bcd\u7ec4\u4e2d\u53ea\u80fd\u6709\u4e00\u4e2a\u60c5\u6001\u52a8\u8bcd\u3002\u4e0b\u9762\u662f\u201cneed\u201d\u4f5c\u4e3a\u60c5\u6001\u52a8\u8bcd\u7684\u7528\u6cd5\uff1a
\u4e00\u3001need\u8868\u793a\u201c\u9700\u8981\u201d\u6216\u201c\u5fc5\u987b\u201d\uff0c\u901a\u5e38\u7528\u4e8e\u5426\u5b9a\u53e5\u548c\u7591\u95ee\u53e5\u3002\u4f8b\u5982\uff1a
1\uff0eYou needn't do it again\uff0e\u4f60\u4e0d\u9700\u8981\u518d\u505a\u4e86\u3002
2\uff0eHe needn't worry about it\uff0e\u8fd9\u4ef6\u4e8b\u4ed6\u65e0\u9700\u62c5\u5fc3\u3002
3\uff0eNeed he do this homework first\uff1f\u4ed6\u9700\u8981\u5148\u505a\u8fd9\u4e9b\u4f5c\u4e1a\u5417\uff1f
4\uff0eNeed they fill in the form\uff1f\u4ed6\u4eec\u9700\u8981\u586b\u8868\u5417\uff1f
\u4e8c\u3001\u5728\u5426\u5b9a\u53e5\u4e2d\uff0c\u53ef\u4ee5\u7528need\u7684\u5426\u5b9a\u5f62\u5f0f\uff0b\u4e0d\u5b9a\u5f0f\u5b8c\u6210\u4f53\u3002\u4f8b\u5982\uff1a
1\uff0eWe needn't have worried\uff0e\u5176\u5b9e\u6211\u4eec\u4e0d\u5fc5\u8981\u614c\u3002
2\uff0eYou needn't have mentioned it\uff0e\u4f60\u672c\u6765\u4e0d\u5fc5\u63d0\u8d77\u8fd9\u4ef6\u4e8b\u3002
3\uff0eYou needn't have said that when he asked\uff0e\u5f53\u4ed6\u95ee\u7684\u65f6\u5019\uff0c\u4f60\u5176\u5b9e\u4e0d\u5fc5\u8981\u8bf4\u3002
\u4e09\u3001needn't\u540e\u7684\u4e0d\u5b9a\u5f0f\u95f4\u6216\u4e5f\u80fd\u7528\u8fdb\u884c\u5f0f\u6216\u88ab\u52a8\u8bed\u6001\u3002\u4f8b\u5982\uff1a
1\uff0eHe needn't be standing in the rain\uff0e\u4ed6\u4e0d\u5fc5\u8981\u7ad9\u5728\u96e8\u4e2d\u3002
2\uff0eWe needn't be waiting in this place\uff0e\u6211\u4eec\u4e0d\u5fc5\u8981\u5728\u8fd9\u513f\u7b49\u3002
3\uff0eThe hedges needn't be trimmed thisweek\uff0e\u672c\u5468\u6811\u84e0\u4e0d\u5fc5\u8981\u6574\u4fee\u3002
\u201cneed\u201d\u4f5c\u4e3a\u5b9e\u4e49\u52a8\u8bcd\u65f6\uff0c\u901a\u5e38\u7528\u6cd5\u662f\uff1a
\u4eba\uff0bneed \uff0bto do
\u7269\uff0bneed \uff0bdoing
\u7269\uff0bneed \uff0bto be done
\u53e6\u5916\uff0c\u201cneed\u201d\u540e\u8fd8\u53ef\u4ee5\u76f4\u63a5\u8ddf\u540d\u8bcd\u3002\u8bf7\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a
1\uff0eWe need to collect the parcel before we leave for England\uff0e\u53bb\u82f1\u56fd\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u6536\u62fe\u597d\u884c\u674e\u3002
2\uff0eWe need to tell him the truth\uff0e\u6211\u4eec\u9700\u8981\u544a\u8bc9\u4ed6\u771f\u76f8\u3002
3\uff0eMy car needs repairing\uff0e\u6211\u7684\u6c7d\u8f66\u9700\u8981\u4fee\u7406\u3002
4\uff0eThe flowers need watering\uff0e\u8fd9\u4e9b\u82b1\u9700\u8981\u6d47\u6c34\u3002
5\uff0eHis leather shoes needs to be mended\uff0e\u4ed6\u7684\u76ae\u978b\u9700\u8981\u4fee\u8865\u3002
6\uff0eHer room needs cleaning\uff0e\u5979\u7684\u623f\u95f4\u9700\u8981\u6253\u626b\u3002
7\uff0eIt is aquestion that needs very careful consideraton\uff0e\u8fd9\u662f\u4e00\u4e2a\u9700\u8981\u614e\u91cd\u8003\u8651\u7684\u95ee\u9898
need do sth \u4e2d\u7684need\u662f\u60c5\u6001\u52a8\u8bcd\uff0c\u540e\u9762\u8ddf\u52a8\u8bcd\u539f\u5f62\u3002need to do sth \u4e2d\u4e00\u822c\u662f\u5b9e\u610f\u52a8\u8bcd\u3002
need\u7684\u7528\u6cd5\u8bb2\u89e3\uff0c\u4f9b\u53c2\u8003\uff1a
\u4e00\u3001\u4f5c\u60c5\u6001\u52a8\u8bcd
1\u3001need\u4f5c\u60c5\u6001\u52a8\u8bcd\u65e0\u4eba\u79f0\u6216\u6570\u7684\u53d8\u5316\uff0c \u540e\u63a5\u52a8\u8bcd\u539f\u5f62\uff0c\u591a\u7528\u4e8e\u5426\u5b9a\u53e5\u548c\u7591\u95ee\u53e5\u4e2d\u3002\u5982\uff1aYou needn't worry.\u4f60\u4e0d\u5fc5\u62c5\u5fc3\u3002
2\u3001\u7531need\u5f15\u51fa\u7684\u4e00\u822c\u7591\u95ee\u53e5\uff0c\u80af\u5b9a\u56de\u7b54\u5e38\u7528must\u6216have to;\u5426\u5b9a\u7b54\u8bed\u5e38\u7528needn't. \u5982\uff1a\u2014Need I answer the question? \u6211\u9700\u8981\u56de\u7b54\u90a3\u4e2a\u95ee\u9898\u5417\uff1f\u2014Yes, you must. /Yes, you have to.\u662f\u7684\uff0c\u4f60\u5fc5\u987b\u56de\u7b54\u3002/\u662f\u7684\uff0c\u4f60\u5f97\u56de\u7b54\u3002/No, you needn't.\u4e0d\uff0c\u4e0d\u5fc5\u4e86\u3002
3\u3001\u7531must\u5f15\u51fa\u7684\u4e00\u822c\u7591\u95ee\u53e5\uff0c\u80af\u5b9a\u56de\u7b54\u7528must,\u5426\u5b9a\u7b54\u8bed\u7528needn't\u6216don't have to\u3002\u5982\uff1a\u2014Must I do the work now? \u6211\u5fc5\u987b\u73b0\u5728\u5e72\u8fd9\u4e2a\u6d3b\u5417\uff1f\u2014Yes, you must /have to.\u662f\u7684\uff0c\u4f60\u5fc5\u987b\u505a\u3002/No, you needn't /don't have to. \u4e0d\uff0c\u4f60\u73b0\u5728\u4e0d\u5fc5\u505a\u3002
\u4e8c\u3001\u4f5c\u884c\u4e3a\u52a8\u8bcd
need \u4f5c\u4e3a\u884c\u4e3a\u52a8\u8bcd\u6709\u4eba\u79f0\u548c\u6570\u7684\u53d8\u5316\uff0c \u540e\u9762\u53ef\u63a5\u540d\u8bcd\u3001\u4ee3\u8bcd\u3001\u52a8\u540d\u8bcd\u53ca\u5e26to \u7684\u52a8\u8bcd\u4e0d\u5b9a\u5f0f\uff1b\u53ef\u7528\u4e8e\u80af\u5b9a\u53e5\u3001\u7591\u95ee\u53e5\u548c\u5426\u5b9a\u53e5\u4e2d\uff0c\u5982\uff1a
She needs help\u3002\u5979\u9700\u8981\u5e2e\u52a9\u3002
I don't need to see the doctor\u3002\u6211\u4e0d\u9700\u8981\u770b\u75c5\u3002\u2014Do you need to go at once? \u4f60\u9700\u8981\u9a6c\u4e0a\u8d70\u5417\uff1f\u2014Yes, I do.\u662f\u7684\uff0c\u6211\u5f97\u9a6c\u4e0a\u53bb\u3002\u2014No, I don't.\u4e0d\uff0c\u4e0d\u7528\u9a6c\u4e0a\u8d70\u3002
希望能帮到你，祝更上一层楼O(∩_∩)O
有不会的欢迎再继续问我(*^__^*)
needn't do 和 don't need to do 两者有些差别。
从用法上，前者是情态动词，后者是实义动词。
从意义上，前者暗示已经做了,有“本不需要”的意思，后者暗示还没有做，就是纯粹地“不需要”。
如：
You needn't do the housework.(说话时你已经做了家务)
You don't need to do the housework.(说话时你尚未做家务
望采纳！
need，一种是情态动词（必须的意思），用法，和can一样的。。所以他的否定就是needn't(cann't)。
翻译：不必
另一种及物动词（需要的意思）。用法，和任何及物动词都一样，以like为例；所以否定就是don't need(don't like) 翻译：不需要。
还有就是有个小窍门：人做主语：人+need to do ;物做主语：物+need doing 或者need to be done!!!
个人总结，完全受用的。祝学习进步。。。
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