Present Perfect
*Started in the past and still continuing now
*just finished / you notice the effects(results) now
*no time indication
*experiences
+ = have/has + 2nd form or verb-ed
I have washed the clothes
- = hasn't/haven't + 3rd form or -ed
You haven't done your homework
? = have/has + subject + 3rd form or -ed
Have you watched the game?
for / yet / since / just