subject + have/has + verb in past participle+ complement
for example
I have tried Brazilian fish
To write the affirmative from of the Present perfect we use as auxiliary the verb to have in present simple
and accompanied by the main verb in its Past participle
use regular and regular verb
is very common use 3° person place in the verb a s
to write the negative from of the present perfect use have not /has not
to write the questions use have /has+ subject + verb+
complement