Так не в Present Simple, а в Present Continuous, судя по примеру.
Have - having.
Swim - swiming.
Go - going.
Work - working.
Meet - meeting.
Practise - practising.
Eat - eating.
Do - doing.
Look - looking.
Paint - painting.
Serve - serving.
Read - reading.
Deliver - delivering.
Waint - wainting.
Come - coming.
having, swiming, going, working, meeting, practising, eating, doing,
looking, painting, serving, reading, delivering, wainting, coming.
