Interested and interesting are both adjectives that describe a person or thing that arouses curiosity or holds the attention. The main difference between the two is that “interested” describes the state of being interested, while “interesting” describes the thing that causes interest.
Bored and boring are also adjectives that describe a person or thing that lacks interest or is tedious. The main difference between the two is that “bored” describes the state of being bored, while “boring” describes the thing that causes boredom.
「Bored」 和 「boring」也是形容詞，用來形容缺乏興趣或乏味的人或事物。兩者的主要區別在於，「Bored」 描述的是感到無聊的狀態，而 「boring」描述的是引起無聊的事物。
Here are some examples to illustrate the difference: 以下是一些例子來說明區別：
Interested: She was very interested in the lecture. (The person was in a state of being interested.)
Interesting: The lecture was very interesting. (The lecture was the thing causing interest.)
Bored: The students were bored during the long lecture. (The students were in a state of being bored.)
Boring: The long lecture was boring. (The lecture was the thing causing boredom.)
In short, the difference is that active adjectives, ending in –ing, express the idea that someone or something causes a certain effect. Passive adjectives, which end in –ed, express that someone or something experiences this effect. Other examples include exciting, excited, amazing, amazed, depressing, and depressed.
長話短說，以 –ing 結尾的主動形容詞表示有人或某物引起某種效應。以 –ed 結尾的被動形容詞表示有人或某物經歷了這種效應。其它例子包括 「exciting, excited, amazing, amazed, depressing, depressed」。