几位老师的分析都有道理。下面是我个人的看法，不一定对，写出来与大家讨论，向大家学习！

▲我觉得从语法上看，两者都对，但稍有不同：feel angry 中的feel为连系动词，侧重指状态，即主语处于某种特定的情感状态之中；feel anger 中的 feel为实义动词（及物），侧重指体验，即主语对某种特定情感的体验。但从语义上看，这两种表达意思基本相同。如：

You have every justification for feeling angry. 你完全有理由感到气愤。

Jenny often feels anger, but doesn’t show it. 珍妮常感到愤怒，但她不表现出来。

When we feel anger, we bury the emotion and feel guilty instead. 当我们感到愤怒时，压抑这种情绪反而会觉得内疚。

▲其实这类用法不仅仅局限于 feel angry 与 feel anger。当 feel 后接表示表示内心情感的形容词时，大多可以换成相应名词（如果有相应的名词的话）。比较：

1. feel sad / feel sadness

I felt sad about leaving him, but I had no choice. 离开他我很难过，但我别无选择。

I certainly do not feel sadness about that. 我当然不会对此感到伤心。

2. feel regretful / feel regret

Surprisingly, she didn’t feel regretful about her actions. 令人惊讶的是，她并没有对她的行为感到紧张或后悔。

She felt regret about what she had done. 她对自己所做的事感到懊悔。

3. jealous / jealousy

I’d be ashamed to admit feeling jealous. 我不好意思承认自己感到嫉妒。

She’d never felt jealousy before. 她以前从未感到过嫉妒。

▲不过值得说明的是，如果其前有 the, one's, no, deep, great, much, some, any 等限定词或形容词的修饰，则宜用名词形式。如：

David could feel his anger returning. 戴维感觉自己的怒气又上来了。

Sally felt her anger drain away. 萨莉感到自己的怒气慢慢消散了。

She could feel the anger bubbling up inside her. 她能感到自己怒火中烧。

He feels deep regret about his friend’s death. 他对朋友的去世深感惋惜。

He seemed to feel no remorse at all. 他似乎一点也不感到悔恨。

She felt some sadness when the time came to leave. 到了要离开的时刻，她感到有些悲伤。

Richard felt no guilt at all for what he had done. 理查德丝毫不为自己的所作所为感到内疚。

▲另外，根据平行结构的对称性原理，若与形容词并列，则用形容词；若与名词并列，则宜用名词。比较：

She feels anxious and depressed. 她感到使既焦虑又沮丧。

I was made to feel guilty and irresponsible. 我被弄得心生内疚，觉得自己很不负责任。

They feel both anxiety and joy. 我感到既焦虑又欣喜。

They feel shame and guilt as though it is their fault. 他们觉得羞愧和内疚，就好像这是他们的错。