◇ Gerunds
動名詞
動名詞與「名詞」一樣，可當句子的主、受詞或補語。例中， the technique is currently about as likely to damage your eyes as wearing...。" wearing..." 這一個片語功能就類似於名詞。而現在分詞則扮演「形容詞」的角色，可用來修飾名詞或作為補語，如 "incoming light" 中的 "incoming"。
Example：
1. Harley has a bad habit of biting her fingernails when she's anxious.
Harley 有個壞習慣是，緊張的時候會咬牙齒。（biting...作為名詞）
2. Denise finds it frustrating when people in front of her walk too slowly.
Denise 遇到前面的人走太慢時，就會感到很挫折。（frustrating 作為形容詞）
3. Eating a healthy diet is good for your body and mind.
有健康的飲食習慣對身心都有好處。（Eating... 當作名詞）