Tenses used to talk about events that have happened

We use the  Simple Past when events  happened in a specific time : WHEN?

We have studied the simple past and we have learnt about it : it tells us about events that happened in the past

Jack   married  Susan  in 2009

Marion  left the book on the  table  yesterday

Now read this sentence : it tells us about events  that have  happened but we  do not  say when  they happened

Juliet and Marion have just married

I have lost my key : how can I enter my house?

When we do not  focus on when an event occurred we use  the  Present Perfect 

How to build  sentences using the Present Perfect

Subject+ have/has + past participle

Subject + have/has + not + past participle

……  have/has + subject + past  participle?

 

Now  watch these videos and focus on the  key words we use  in English  when  we have the  Present  Perfect :

 

 

 

Can you make a list of the main  keywords ?