Grammar Tips (Jesse)

Is time the important point? / If so, when? / Amount or number of times / Specific or General past or future? 
Have done / haven’t done = life / times
I go to work – generally / times / how often 
I went to work – specific past 
I have been to work – life / times 
eg. i have met your colleague
eg2. i have travelled to Japan 5 times
half an hour = 30 minutes