怎样判断to后面到底是动词原形还是动名词 to后面是跟动名词还是动词原型？？
to\u540e\u9762\u662f\u8ddf\u52a8\u540d\u8bcd\u8fd8\u662f\u52a8\u8bcd\u539f\u578b\uff1f\uff1f\u9996\u5148\u8981\u8bf4\uff0c\u5c0f\u670b\u53cb\uff0c\u4f60\u5728\u5b66\u4e60\u4e2d\u975e\u5e38\u5584\u4e8e\u89c2\u5bdf\uff0c\u4f46\u662f\u901a\u5e38\u60c5\u51b5\u4e0b\u4ecb\u8bcdto\u52a0\u4e0a\u52a8\u8bcd\u539f\u5f62\u53eb\u505a\u52a8\u8bcd\u4e0d\u5b9a\u5f0f\uff0c\u4f46\u662f\u6709\u65f6\u5019\u5728\u4e00\u4e9b\u8bcd\u7ec4\u91cc to \u5e76\u4e0d\u662f\u4e0d\u5b9a\u5f0f\u7684\u7b26\u5408\uff0c\u540e\u9762\u53ef\u4ee5\u52a0\u4e0a\u52a8\u540d\u8bcd\uff0c\u6bd4\u5982\uff1aWe look forward to seeing you soon ,\u201c\u6211\u4eec\u671f\u671b\u5f88\u5feb\u7684\u770b\u5230\u4f60\u201d\uff0c\u4eca\u540e\u4f60\u4f1a\u6e10\u6e10\u7684\u660e\u767d\u7684\uff0c\u795d\u8fdb\u6b65\u3002
~\u624b\u5de5\u7ffb\u8bd1\uff0c\u5c0a\u91cd\u52b3\u52a8\uff0c\u6b22\u8fce\u63d0\u95ee\uff0c\u611f\u8c22\u91c7\u7eb3\uff01~
\u4e00\u822cto\u540e\u9762\u662f\u63a5\u52a8\u8bcd\u539f\u5f62\u5440\uff0c\u53ef\u662f\u4e5f\u8981\u770b\u642d\u914d\u8ddf\u7528\u6cd5\u5440\uff01\u6bd4\u5982\u8bf4\u5b81\u613f\u505a\u67d0\u4e8b\u5c31\u53ef\u4ee5\u8bf4prefer
doing
to
doing
\u5440\uff01
如何知道to后面该接动词原形，还是动名词呢？
倒推简单，根据to作为不定式接动词原形，to做介词接动名词，就可以推倒出来to的成分了。
可是顺推怎么办？我们可以在to后面加任意一个名词。比如代名词“you”，如果发现语义和语法是完全通顺的，那to肯定就是介词。反之，则是动词不定时。举例：
I used to play basketball. 我过去打篮球，这里在to后面接“you”，就变成I used to you，我过去你？语义不通，只能作为动词不定式存在。
I am used to playing basketball. 我习惯打篮球，这里在to后面接“you”，就变成I am used to you. 我习惯了你，语义和语法说得通，既然可以接名词，那to就是介词了，所以用playing。
当然了，词组的意思还是要记忆的，至于后面接什么，可以靠这个方法去分析。
我也是正在重新捡起英语，说的不一定对，欢迎指正。
是不定式结构to do结构,用动原 ,to 有表目的的意思 如果to单独作为一个介词,要用动名词,因为介词后接doing 这要靠语感和语法的积累。
接动名词的比较少，可以简单记一下：
只要to是介词,后面就要接动名词.如：
be used to doing,习惯于
object to,反对
devote oneself to,致力于
stick to,坚持
pay attention to,注意
respond to,回答
look forward to,期盼
see to,照料
contribute to,帮助
submit to,服从
adapt to,适应
apply to,运用
accede to,同意,就任
prefer to,倾向于
adjust to,使自己适应于
owe to,归咎
react to,作出反应
.access to 接近,进入(某地的)方法; 通路
according to 按照,依照,视……而定
be addicted to 沉溺于……,对……上瘾
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