To know the difference between "boring" or "bored", or "interesting" and "interested", it helps if you know the reasons for the difference. One comes from grammar: the past participle (PP) (VERB+ED/過去分詞) and one comes from the present participle (VERB+ING/現在分詞). So one way to understand the difference is to think about the grammar roots. But there are other ways:

• You can see the difference; 
• You can feel the difference; 
• You can understand the difference;
• You can learn by examples.

Participles are made from verbs. In English there are two - the present participle and the past participle (P.P).

The Present Participle

The present participle is made the following way:

[VERB]+ing

Understanding the parts of speech is very important for studying a language. It helps you understand and talk about grammar and language. It also helps for putting language together. To be a good learner, make sure you know the parts of speech.

Passives

The past participle is used with TO BE to make a passive: