This document discusses irregular verbs in English. It notes that irregular verbs form their past and past participle by changing one vowel. It provides examples of irregular verb patterns, including verbs where the past ends in "-ew" and the past participle ends in "-wn", verbs where the past participle ends in "-en", and verbs that do not follow a clear pattern. The document also contains exercises for students to practice using simple past and past perfect tenses.

8. Irregular verbs
• One vowel is changed to form the past and past participle

9. The past and the past participle are the same
Base form Past Past participle

10. The past and the past participle are the same
Base form Past Past participle

11. The base form and the past
participle are the same

12. The past ends in - ew, and the past
participle ends wn -

13. The past participle ends in -en

14. The past and the past participle
don’t follow any pattern

15. The base form, the past, and the past
participle are the same

16. • A. Fill in the blanks with the appropriate forms of the verbs
inside the parentheses using simple past and past perfect
tenses. Write your answer in a separate sheet of paper.
• 1. Before the students (start) ____________ to answer, the
teacher instructed them what to do.
• 2. The students (master) ____________ the tenses of the
verb before they moved on to the next lesson.
• 3. They (asked) ____________ many questions when they
did not understand the lesson well.
• 4. After Lemy (read) ___________ the book, her friends
borrowed it.
• 5. Dan (submit) ____________ his book report before the
deadline came.

18. • A. Fill in the blanks with the appropriate forms of the verbs inside the
parentheses
• using simple past and past perfect tenses. Write your answer in a separate
sheet
of paper.
• 1. Before the students (start) ____________ to answer, the teacher
instructed them what to do.
• 2. The students (master) ____________ the tenses of the verb before they
moved on to the next lesson.
• 3. They (asked) ____________ many questions when they did not
understand the lesson well.
• 4. After Lemy (read) ___________ the book, her friends borrowed it.
• 5. Dan (submit) ____________ his book report before the deadline came.