Persent Perfect tense

Present Perfect Tense THANATCHA TONGMIT

 2.

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การกระทําที่เพงเกิดขึ้น เพิ่งเสร็จ หรือเรียบรอยไป แลว

yet, just, already

- Have you finished your homework yet?

- I have just finished my homework.

- I have already finished my homework.

3. 

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เหตุการณทเ่ี กิดขึน้ ในอดีต ดําเนินเรือ่ ยมาจนถึงปจจุบนั for, since, ever since, since then, so far, up to now, up to the present time We have studied here for four years.

We have studied here since 1998.

We have studied here since I was 10 years old.

He has worked in this office for twenty years so far.

Up to now, he has worked as a clerk

4. 

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ever, never

Have you ever been to New York City?

I have never seen a ghost.

He has ever eaten a snake.

Susan has never married .

You and I have ever been student here.

 Form  วิธีใช

Present Perfect Continuous Tense has, have + been + V. ing

การใชเหมือน Present Perfect tense แต Present Perfect Continuous Tense เนนการตอเนื่อง  Bill has lived in Bangkok since 1975.  Bill has been living in Bangkok since 1975.  ขอสําคัญ  จะตองใชกับ Verb continuity of action เชน stay, wait, sit, live, work etc.  The clock has been stopping (wrong)  The clock has stopped. (right) 