关于动名词的一个用法不解

亲亲号

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动名词的形式有doing 和 having done，后者是完成式，用于发生在句子谓语动作之前的动作，
/ d" P) i' ^! u2 z7 m如That young man still denies having started the fire behind the store.
但由于start是短暂动词，这里如果只用现在分词的一般式也是正确的把？而且意义没有太大区别？
+ `+ W: ?4 ~$ h: O" {0 WThat young man still denies starting the fire behind the store.

类似还有这些句子
I repented shooting/having shot the bird
5 s  t4 p  V, F3 q1 T0 ~The man in the corner confessed to telling/having told a lie to the manager of the company.
The student denied cheating/having cheated on the exam.
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" W/ L! [+ [1 n请问这样理解是正确的么？
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nullname

个人认为，楼主这些例子里面的 having+pp 形式是从句简化导致的变形。
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即：That young man still denies having started the fire behind the store. 这句话跟动名词一点关系都没有。

8 G5 }/ @# j& P6 ]' g我觉得上句应是下句的简化：
0 D" R2 i9 a4 \3 GThat young man still denies that he had started the fire behind the store.
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同理：
0 W* }; y1 g% ~. A1 n" `I repented that I had shot the bird
简化为
+ |2 j8 M+ A  r8 [4 U! T  D' _/ ~I repented having shot the bird
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参考：语法俱乐部   旋元佑

pisgfa

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两个句子都没问题，意思是一样的。having started 强调 放火发生在否认之前。
" _; i9 A  A$ U; Y1 _# H& ~# r如果没有 supporting references 的话，推荐用 That young man still denies starting the fire behind the store. 更符合外国人习惯。

$ l9 j0 @$ Z/ y# B/ O7 A) EThat young man denied that he had started the fire before sunrise.

That young man still denies having started the fire before sundown.
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williamshein

个人同意三楼的解释，having done和doing都是可以作为动名词使用，但是语言的简化是因为用了doing不会产生误解，照样理解，并且这样还更简单，所以才简化成这样，至于楼主提到的start的短暂性，这里我觉得其实根本不需要考虑，因为不管短暂还是延续性都是发生在过去的，用having done都是为了强调发生的时间的先后顺序。用一些的初中、高中的例句来解释：I am sorry for interrupting (或having interrupted） you./ I remember locking (having locked) the door. 理解起来都是一样的。