Verbs constitute one of the main parts of speech (word classes) in the English language. Like other types of words in the language, English verbs are not heavily inflected. Most combinations of tense, aspect, mood and voice are expressed periphrastically, using constructions with auxiliary verbs.
• A regular English verb has only one principal part, from which all the forms of the verb can be derived. This is the base form or dictionary form. Most irregular verbs have three principal parts, since the simple past and past participle are unpredictable.
• The infinitive, simple past and past participle are sometimes referred to as First , Second and Third form of a verb, respectively.
• The verbs do, say and have additionally have irregular third person singular present tense forms (see below).
1. To be – (ser o estar)
2. To have – (tener)
3. To do – (hacer)
4. To say – (decir)
5. To get – (obtener)
6. To make – (hacer)
7. To go – (ir)
8. To know – (saber, conocer)
9. To take – (tomar)
10. To see – (ver)
11. To come – (venir)
12. To think – (pensar)
13. To look – (mirar)
14. To want – (querer)
15. To give – (dar)
16. To use – (usar)
17. To find – (encontrar)
18. To tell – (decir)
19. To ask – (preguntar)
20. To work – (trabajar)