"Tom is being foolish." Here Tom is-

যে verb বাহ্যিকভাবে কাজ করা না বুঝিয়ে বরং অবস্থা বুঝায়, তাকে stative verb (অবস্থাধর্মী ক্রিয়া) বলে। যেমন: See, hear, feel, smell, taste, love, like, hate, believe, forget, appear, to be, remain, have, own, owe, belong, deserve ইত্যাদি। সাধারণত এই verb গুলোর continuous tense হয় না।

A verb is considered to be a stative verb if it is expressing a state or condition rather than an action.

Examples of statives are:

want, know, have (when it means possession), think (when it means opinion), like, love, hate, need, prefer, agree, sound, hear disagree, wish, look (when it mean seem), smell, seem, include...

You cannot say:

• I am knowing the truth.
• I am liking pizza.
• It is sounding like a great idea.

But you must say:

• I know the truth.
• I like pizza.
• It sounds like a great idea.