

Unit 25 :
Regular and irregular verbs
Pre-intermediate
Summary
Regular verbs form their past and past participle forms by adding –ed.

Regular verbs
Regular verbs form their past and past participle forms by adding –ed.
- clean → cleaned
- live → lived
- paint → painted
- study → studied
Simple Past tense 現在簡單式
1. I cleaned my room last week.
2. Michelle studied engineering in college.
Past Participle 過去分詞
・have/has + Past Participle
1. I have cleaned my room.
2. Jim has lived in L.A. for 20 years.
・be(is/are/were/has been) + Past Participle
1. These rooms are cleaned every day.
2. My car has been repaired.

Irregular verbs
Irregular verbs form their past and past participle forms in different ways.
There are mainly three types of irregular verbs:
1. Verbs in which all the three forms are the same.
put(s) → put → put
cut(s) → cut → cut
hit(s) → hit → hit
1. She always puts out her clothes for the next day.
2. She put her bag on the table yesterday.
3. Where have you put the keys?
2. Verbs in which two of the three forms are the same.
sit(s) → sat → sat
make(s) → made → made
find(s) → found → found
1. She makes all her own clothes.
2. Butter is made from milk.
3. I have made some coffee.
3. Verbs in which all three forms are different.
drink(s) → drank → drunk
break(s) → broke → broken
know(s) → knew → known
1. Somebody breaks this window.
2. Somebody broke this window last night.
3. I’m so sorry, I think I’ve broken your phone.