Present perfect tense

Its time for...
Present perfect tense
 
Formula:
Positive: S + have/has + V3
Negative: S + have/sas Not + V3
Introgative:   Have/has + S + V3
 
Here are some examples of the present perfect tense:
subjectauxiliary verbmain verb
+IhaveseenET.
+Youhaveeatenmine.
-Shehasnotbeento Rome.
-Wehavenotplayedfootball.
?Haveyoufinished?
?Havetheydoneit?

When we use the present perfect tense in speaking, we usually contract the subject and auxiliary verb. We also sometimes do this when we write.
I haveI've
You haveYou've
He has
She has
It has
John has
The car has
He's
She's
It's
John's
The car's
We haveWe've
They haveThey've

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