PRESENT PERFECT SIMPLE

USE: We use PRESENT PERFECT SIMPLE to talk about:

1) The action which has happened in the past and continue until now.

Example:

- I have learned English for three years.

- He has become a doctor since 2009.

- Jame has stopped working for two years until now.

2) The action that happened in the past, but the result is in present.

Example:

- We have built a house for our children.

- Michael has written a letter to his friend in Cambodia.

- I have made a company.

3) The action which has just finished at the moment of speaking (recent past action).

Example:

- John has just arrived home this morning.

- We have eaten rice at the moment.

- They have just finished work now.

FORMULA

Positive Sentence:

Subject + have/has + past participle + object/complement

Example:

- They have gone home now.

- A lot of people have moved their houses.

- Jany has arranged his office today.

Negative Sentence:

Sub + have/has + not + past participle + obj/comp

Example:

- They have not been in Cambodia.

- The global economy has not recovered yet.

- The environment problems have not completely solved.

Question:

Have/Has + sub + past participle + obj/comp ?

Example:

- Has she gotten married?

- Have you changed your work?

- Have you heard the information about our friends?