1. The Present Perfect Tense
Carlos & Tina

2. Learning aims 1.To know the present perfect tense.
2.To master the structure of the PPT.   
3.To learn the differences between the simple past tense and the present perfect tense.

3. Eddie has lived with Millie since he was born.
Features one: We use the present perfect tense to talk about things that started in the past and continue to the present.
Eddie has lived with Millie since he was born.
Eddie has lived with Millie for four years.
present
Past
present
Past
4 years

4. Signal words : since
The phrase of “since” said the past still continues, the object after “since” must be a time point.
1.Mr. Smith has worked here since 1984.
2.He’s learned about 5,000 English words since he went to college.

5. Signal words : for
The phrase of “for” means the action continues a long time, the object is a period of time.
1.We have known each other for twenty years.
2.I haven’t seen her for a long time.

6. Feature two: We also use the present perfect tense to talk about things that happened in the past and have connection with the present.
Andy has eaten my food.
(Andy ate the food and now I have nothing to eat.)

7. The structure of PPT Affirmative sentence Patterns: Subject + have Subject + has
+ Past Participle
1. We have lived in Beijing.
2. He has lived in Beijing.
3. I have finished my homework.

8. Negative sentences
Patterns : Subject + have/has + not + Past Participle
1. I have not seen the movie yet.
2. He hasn’t been to Beijing since then.

9. Patterns : Have/Has + Subject + Past Participle
The general questions sentence
Patterns : Have/Has + Subject + Past Participle
1.Have you finished the work?
2.Has she arrived here?
The special questions sentence
Patterns : WH + have/has + Subject + Past Participle
1.How many times have you been to the Great Wall

10. Main use of the PPT
1. Express a past event that has present consequences
Someone has just turned off the light.
I have already finished my homework.

11. Main use of the PPT
2. The events described by present perfects are not necessarily completed
I want to see how much the place has changed since I saw it last.
I have learnt English for more than ten years.

12. STRUCTURE OF PP AAA ABB Type original p.t p.p cost read meet met catch
caught
ride
rode
ridden
speak
spoke
spoken
drink
drank
drunk
eat
ate
eaten
AAA
ABB
ABC

13. The differences of the simple past tense and present perfect tense
The SPT focus on the time of action happened
The PPT focus on the result of action
The PPT must not after those phrases express past time
Include “when”.

14. Thanks