State verbs are verbs which do not normally have continuous tenses because they describe a state rather than an action. These include:

• verbs which express likes and dislikes: like, love, hate, dislike, enjoy, pre etc
  e.g. Cathy likes romantic films
  
• verbs of perception: believe, know, notice, remember, forget, recognize, understand, realize, seem, think, etc.
   e.g. I don't believe a word he's saying.