在英文中，那些有进行式ing 形式，看得见动作正在进行，并持续进行一段时间的动词，称为动态动词，例如 : watch/ watching, play/ playing, eat/eating, read/reading, work/working, speak/speaking, cook/cooking等。
但，并不是所有的动词都有ing的形式，有些动词表达的是一个状态，只是存在于意念、思想、概念、感受与情绪当中，看不见实际发生的动作，就不能有ing的说法，这些动词称为非动态动词、亦称为状态动词，例如 : know / understand / believe / realize / recognize / prefer / agree / want / need / seem / own / belong
I know Jack. 我认识Jack
≠ I am knowing Jack.
I don’t understand what you said. 我不懂你说的意思
≠ I am not understanding what you said.
I still believe that people are fundamentally good. 我依旧相信人的本质是良善的
≠ I still am believing that people are fundamentally good.
They realize the danger they are in. 他们意识到自己身处的危险
≠ They are realizing the danger they are in.
I prefer coffee to tea. 我喜欢咖啡胜过茶
≠ I am preferring coffee to tea.
I agree with you on the issue. 在这问题上我同意你的看法
≠ I am agreeing with you on the issue.
I want to spend more time with my family. 我想多花时间和家人在一起
≠ I am wanting to spend more time with my family.
I need to get some fresh air. 我需要出去透透气
≠ I am needing to get some fresh air.
I seem to know more about Michael than anyone else. 我似乎比其他人更了解Michael
≠ I am seeming to know more about Michael than anyone else.
We own our apartment. 我们拥有自己的公寓
≠ We are owning our apartment.
This book belongs to Laura. 这本书是Laura的
≠ this book is belonging to Laura.
