Extra: Present perfect - 2

Topic 1: Experience 
You can use the Present Perfect to describe your experience. It is like saying, "I have the experience of..."
You can also use this tense to say that you have never had a certain experience.
The Present Perfect is NOT used to describe a specific event.

Examples:

Topic 2: Change Over Time 
We often use the Present Perfect to talk about change that has happened over a period of time.

Examples:

Topic 3: An Uncompleted Action You Are Expecting 
We often use the Present Perfect to say that an action which we expected has not happened.
Using the Present Perfect suggests that we are still waiting for the action to happen.

Examples:

Note that Dutch uses the Onvoltooid Tegenwoordige tijd in some of those cases:

Topic 4: Multiple Actions at Different Times
We also use the Present Perfect to talk about several different actions which have occurred in the past at different times.
Present Perfect suggests the process is not complete and more actions are possible.

Examples: