State the form of the infinitive. Translate the sentences:
1) To take him seriously would be absurd. 2) For a moment she
appeared to be hesitating. 3) The sportsman seemed to have gained
all he wanted. 4) Dinner was ready to be served. 5) He is sorry to
have offended you. 6) She pretended not to be listening. 7) He
claims to have returned the book to the library. 8) The letter seems
to have been mislaid. 9) She happened to have been enquiring all
this time whether all the invitations had been sent out. 10) She is
curious to know the news. 11) It was unwise for him to be so rude
to his colleagues. 12) The dog turned out to have been waiting for
the master in the street all this time. 13) The box seems to have been
unpacked by somebody. 14) They seem to be happy together

1, 2, 3 предложения - активная форма

!  To take - simple (простой инфинитив)  2 to be hesitating - continious form  of the infinitive ( длительная форма инфинитива)   3  to have gained -  perfect form (перфектная форма инфинитива )  4 to be served -пассивная форма простого инфинитива  5 to have offended - перфектная форма в активном залоге  6  to be listening длительная форма  7to have returned  -перфектная форма  8 to have been mislaid -перфектная ф. в пассивном залоге  9 to have been enquiring - длительная форма в пассивном залоге 10  to know - простой инфинитив в активной ф. 11 to be-  простой инфинитив в активной ф. 12 to have been waiting- перфектно-длительный инф. в активной ф. 13  to have been unpacked -перфектный инфинитив в пассиве  14 to be-  простой инфинитив в активной ф. (где форму не писала, там везде active form - активная форма инфинитива