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2 Y4 W& z/ O+ }% @* W3 C5 w有一天问了一个v-ing的问题，　想知道到底是用ａｄｊ还是ａｄｖ修饰， 别人分享了一个链接。我觉得挺好。摘抄几段我自己目前能理解的：
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1. The different types of word ending in -ing
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• The gerund is a verb which is used as if it were a noun (Examples 1 & 2 below). Since it is a verb, it can not be qualified by an adjective, nor preceded by an article, but, like other forms of the verb, it can be modified by an adverb and take a complement .
• A verbal noun (Examples 3 & 4)  is a noun formed formed from a verb; some of these end in -ing.
  Verbal nouns, like other nouns,  can take a determiner, and be qualified by adjectives.
• A participle is an adjective or part of a participial phrase qualifying a noun or a pronoun.  (Examples 5 et 6). The present participle is also used in the progressive aspect of verb tenses (Examples 7 & 8).
  

7 M+ ~7 o! ~4 T& n7 i1 a$ o2. The gerund in English : the verb used as a noun
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As the examples above show, the gerund is a verb used as if it were a noun, but not  in the same way as a noun. In other words, it keeps its verbal qualities.  Since it is not used like a noun, it cannot be qualified by an adjective; on the contrary, it keeps some of the essential features that distinguish a verb, notably that it can take a direct object (examples 2, 6, 7, 12, 13, 14 above) , and/or be qualified by an adverb (examples 4 ,5 , 12 & 13
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3. Verbal nouns: nouns that are derived from verbs
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There are a large number of ways of creating a noun from a verb: among the most common of these are words that use the root form of the verb and a noun ending such as -ment (as in achievement), -ance (as in disappearance), -ion (as in confirmation) , or -ing (as in The changing of the guard.)  You can see that these -ing forms really are nouns, not verbs, as they can be qualified by adjectives.