Rule 1 : The following verbs are not usually used in the continuous form. See / Smell / Feel / Hear / Notice / Recognize / See / Think / Agree / Believe / Consider etc.
Ex- The Flower smells sweet.

Rule 2 : The following verbs are not usually used in the continuous form. Remember / Hope / Understand / Mind / Suppose / Hate / Love / Know / Have / Want / Forgive / Keep / Prevent etc. Ex- Please forgive him.