1. Bildung vom Passive Voice Present Perfect Tense
In der Present Perfect Tense wird das Passive gebildet mit:
have/has + been + Past Participle 
 
2. Bildung der Personalformen in der Present Perfect Tense:
Bilde alle Passivformen von "help"
1.P.EZ.: I have been helped
2.P.EZ.: you have been helped
3.P.EZ.m.: he has been helped
3.P.EZ.w.: she has been helped
3.P.EZ.s.: it has been helped
1.P.MZ.: we have been helped
2.P.MZ.: you have been helped  
3.P.MZ.: they have been helped
 
3. Beispielsätze:
a) Singular:
Aktive: He has told a story.
Passive: A story has been told by him.
Passive Question: Has a story been told by him?
Negation: A story has not been told by him.
 
b) Plural:
Aktive: They have built two cottages
Passive: Two cottages have been built by them.
Passive Question: Have two cottages been built by them?
Negation: Two cottages have not been built by them.
 
4. Sätze mit zwei Objekten = 2 Lösungen:
Aktive: She has given me a present
Passive I: I have been given a present by her.
Passive II: A present has been given to me by her.
 
Aktive: She has written him a letter. 
Passive I: He has been written a letter by her.
Passive II: A letter has been written to him by her.
 
Verben, die zwei Objekte erlauben/verbs that may take two objects:
bring, give, offer, show, tell, write, allow, ask...