Change these sentences from active into the passive voice:We pronounce this consonant with aspiration.We form the Present Perfect Tense with the help of the auxiliary verb "to have".She promised me a book.She baked her cake very well.One uses chalk for writing on the blackboard.I shall finish my work about seven o clock.

This consonant is pronounced withaspiration.
The Present Perfect Tense is formed with the help of the auxiliary verb"to have".
A book was promised me by her. I was promised the book.
Her cake was baked very well.
Chalk is used for writing on the blackboard.
My work will be finished (by me) at about seven o clock.