The present perfect tense of the prompts given are:
b. Sally has not found a job yet.
c. We have been to Wien four times already
d. I have not bought a car yet
e. David is yet to arrive from London
f. Dorothy has never seen a Star Wars film.
Present perfect tense is an action that has an indefinite tone to it whether past or continues into the present.
Thus the correct present perfect tenses are:
b. Sally has not found a job yet.
c. We have been to Wien four times already
d. I have not bought a car yet
e. David is yet to arrive from London
f. Dorothy has never seen a Star Wars film.
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