Here are some possibilities you might be referring to:
* Irregular verbs: These verbs have unique forms in the past tense and past participle, often not following the usual "add -ed" rule. Examples: *go* (went, gone), *eat* (ate, eaten), *see* (saw, seen).
* Modal verbs: These verbs express possibility, necessity, permission, etc. They are followed by another verb in its infinitive form. Examples: *can, could, may, might, must, should, will, would*.
* Phrasal verbs: These are combinations of a verb and a preposition or adverb, creating a unique meaning. Examples: *look up* (search for information), *give up* (stop trying), *put off* (delay).
* Verb tenses: Different tenses of a verb indicate the time frame of an action or state. There are numerous tenses in English, including present simple, past simple, present continuous, past continuous, future simple, etc.
* Verb voice: Verbs can be active or passive. An active voice verb shows the subject performing the action, while a passive voice verb shows the subject being acted upon.
If you can provide more context or examples of what you mean by "special verbs," I can give you a more precise answer.