为什么“to”的后面要加动词原形？ 为什么to的后面要加动词原形
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\u4e0d\u5b9a\u5f0f\u662f\u82f1\u8bed\u4e2d\u52a8\u8bcd\u4e0d\u4f5c\u8c13\u8bed\u7684\u4e00\u79cd\u5f62\u5f0f\u3002\u5f53to\u4f5c\u4e3a\u52a8\u8bcd\u4e0d\u5b9a\u5f0f\u7684\u6807\u5fd7\u65f6\uff0c\u540e\u9762\u5c31\u8ddf\u52a8\u8bcd\u539f\u5f62\u3002\u4f8b\u5982want to do something\u201c\u60f3\u8981\u505a\u67d0\u4e8b\u201d\uff1bdecide to do something\u201c\u51b3\u5b9a\u505a\u67d0\u4e8b\u201d\uff0c\u7b49\u7b49\u3002
\u5982\u679cto\u5f53\u4ecb\u8bcd\u7528\u65f6\uff0c\u540e\u9762\u5c31\u52a0\u540d\u8bcd\u8bcd\u6027\u8d28\u7684\u8bcd\uff0c\u5982\u540d\u8bcd\u3001\u4ee3\u8bcd\u3001\u52a8\u540d\u8bcding\u5f62\u5f0f\u3002\u4f8b\u5982get used to doing something\u201c\u4e60\u60ef\u4e8e\u505a\u67d0\u4e8b\u201d\uff1bdevote to doing something\u201c\u81f4\u529b\u4e8e\u505a\u67d0\u4e8b\u201d\uff0c\u7b49\u7b49\u3002
不定式是英语中动词不作谓语的一种形式。当to作为动词不定式的标志时，后面就跟动词原形。例如want to do something“想要做某事”；decide to do something“决定做某事”，等等。
如果to当介词用时，后面就加名词词性质的词，如名词、代词、动名词ing形式。例如get used to doing something“习惯于做某事”；devote to doing something“致力于做某事”，
不一定。
如果to是不定式符号，则后接动词原形；
如果to是介词，则后接动名词，即动词的ing形式。
要判断to的词性，需要靠平时的积累了
不一定，to是介词时接doing,for example :be used to doing 习惯与
如果是介词那就是动名词（动词-ing），如果是不定式那就是动词原形
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绛旓細to do 鍔ㄨ瘝涓嶅畾寮忕粨鏋
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