What are they?The way a verb forms its pasttense determines itsclassification as regular orirregular. A regular verb takesthe –d or –ed ending to denotethe past tense.
Irregular verbs do not takethe –d or –ed ending. They areinflected in various otherways to indicate past tense.
ExamplesRegular believe → believed smile → smiledIrregular run → ran eat → ate
An irregular verb forms its past and past participle by changing vowels (run-- ran) or consonants (build– built) or by changing vowels and consonants (catch – caught) or by making no changes (burst, cost)
Principal Parts of VerbsEvery verb has four basic parts,which are called its principal parts.You must know all of these in orderto form the different tensescorrectly. •Present (aka Infinitive) •Past •Present Participle •Past Participle
Present (aka Infinitive) existing or happening nowknow to knowtake to takewrite to write
Pastexisted or happened in the pastknewtookwrote
Present ParticipleThe present participle of a verb always ends in –ing. knowing taking writing
Past ParticipleThe past participle of a verb always requires a helping verb (have, has, had). had known have taken has written
PracticePresent Past Past Participlebegin 1. __________ have begunfreeze 2. __________ have frozenwrite wrote 3. _________blow 4. __________ have blowndrive drove 5. _________wear wore 6. _________sing 7. __________ have sungride 8. __________ have ridden
PracticePresent Past Past Participlebegin 1. have begunfreeze 2. have frozenwrite wrote 3.blow 4. have blowndrive drove 5.wear wore 6.sing 7. have sungride 8. have ridden
PracticePresent Past Past Participlechoose chose 9. _________go 10. _________ have gonerun 11. _________ have runthrow threw 12. ________come came 13. ________see saw 14. ________speak 15. _________ have spokenburst 16. _________ have burst
PracticePresent Past Past Participlechoose chose 9.go 10. have gonerun 11. have runthrow threw 12.come came 13.see saw 14.speak 15. have spokenburst 16. have burst
PracticePresent Past Past Participleswim swam 17. ________sink sank 18. ________break 19. _________ have brokenbring 20. _________ have brought
PracticePresent Past Past Participleswim swam 17.sink sank 18.break 19. have brokenbring 20. have brought