Perfect

There are two forms of the present perfect tense:

• present perfect simple

present perfect continuous

When we want to talk about an experience, we use the present perfect simple:

I have been to Italy.

Also, when we want to tell that we started something in the past and it still continues, we use the present perfect simple:

Ted has lived in London for five years.

Finally, when a past action has a visible result in the present, we should use the present perfect simple:

Mary can't walk. She has broken her leg.

Watch this video for more visual explanation of the present perfect tenses:

Try the exercise here or here,or the quiz here.